Suila — Video Editor
Speed curves, captions, music
Free · In-App Purchases · Designed for iPad. Not verified for macOS.
A completely free video editor. Auto captions, bilingual lines, translation and polish all happen on your device — no account, no ads, and your videos never get uploaded.
Suila is a video editor for iPhone and iPad. Open it and start cutting — no sign-in.
What's in it:
• Auto captions (on device): speech to captions in dozens of languages — Traditional Chinese, English, Japanese, Korean and more. Add a second language for bilingual captions; translation and polish also run on the device. Edit by hand, drag them into place, import and export SRT.
• Caption styling: font, color, outline, shadow, size and position, with 63 Traditional Chinese, Japanese, Korean and Latin fonts downloaded on demand — or import your own .ttf/.otf.
• Beauty: finds faces automatically and retouches skin only — smoothing, dark circles, blemishes — features stay untouched.
• Automatic face mosaic: faces are tracked frame by frame and pixelated or blurred; tap once to keep the main subject.
• Voiceover and teleprompter: record narration straight into the phone with your script on screen.
• Multi-point speed curves: add control points for smooth slow motion and speed ramps; reverse and freeze frame too.
• Intuitive timeline: split, trim, long-press to reorder; deleting closes the gap, no black frames.
• Text and stickers: free placement, colors, outline, shadow, in/out animations; emoji and sticker packs.
• Filters, color and effects: cinematic LUTs, brightness/contrast/saturation/temperature, underwater correction, plus 15 visual effects.
• 19 transitions and keyframe animation.
• Picture-in-picture, extract audio from video, your own music and built-in sound effects, watermark, cover, end card.
• Six canvas ratios (9:16, 1:1, 16:9, 4:5, 3:4, 4:3), 4K export — what you preview is what you get.
Your videos, audio and projects stay on your device; no tracking, no personal data collected.
Cut it, and 水啦!
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://suila.app/privacy
more Exports from iPhone 16 and later that failed now go through
• Export fix: videos shot on iPhone 16 or later carry Spatial Audio, and after a crop or trim saved from the Photos app they failed to export in Suila (error -12780) unless the clip was muted. Suila now uses the stereo track the video already includes, so these clips export directly, sound and all. Thanks to everyone who reported it.
• iPhone Duo unfolded: the editor gives the panel the full height and scales the timeline proportionally, so the preview is no longer squeezed.
• One less hitch when opening the editor.
1.11.1 2 days ago
Cut the background out of an overlay clip — the person stays, the rest goes
• New: Cut Out. Select an overlay clip and tap Cut Out; Suila finds the people in it on your device and removes the background. Pick Standard or Fine quality, drag Feather and Shrink with a live preview, and hold Preview Original to compare. The analysis runs once and is saved, so speed changes and trims follow along.
• A default watermark: set text or an image in Settings › New Project Defaults › Watermark and every new project starts with it. Edits inside a project affect only that project; the panel says whether you're on the default or the project's own, and Restore Default brings it back in one tap.
• Preview Original responds on the touch: in Beauty, Mosaic and Underwater it used to need a moment of holding — now it switches the instant you press.
1.11.0 6 days ago
Music that gets out of the way — it turns itself down while you talk
• New: Lower Music. Select a video, overlay or voiceover clip and switch on Lower Music; while that clip plays, the background music dips to the level you choose, and the music waveform on the timeline shows where.
• Beauty's under-eye retouch looks more natural: it now follows the eye bag itself and fades out downward and to the sides, so deep bags no longer leave a line and the crease softens.
• Auto captions break lines more naturally: line lengths are evened out, and short lines stay up long enough to read.
• Keyframes survive trims: a keyframe a trim covers is hidden, not deleted — pull the handle back and it returns.
• Volume slider retuned: 50% is now truly half as loud, so quiet levels are easier to set; and two clips on one track with different volumes no longer blend into one long fade.
1.10.0 16 Sept
Beauty is here — a friend wished again, and here it is!
• New: Beauty. Tap Beauty and Suila finds the faces in your clip and retouches skin only — features stay untouched. Three sliders (Skin, Dark Circles, Blemishes) preview live as you drag; hold Preview Original to compare. Works on picture-in-picture clips too. Everything runs on your device; your video never leaves your phone.
• The Mosaic panel is redesigned: four looks you can read at a glance, a strength slider that previews live and snaps every 10%, and a hint to re-detect when a clip is trimmed past what was analyzed. Picture-in-picture clips can be mosaicked too.
• The toolbar is reordered: Captions comes first, then Text, Sticker, Overlay, Music, SFX and Voiceover, with Filter, Adjust, Canvas and Watermark at the end.
• New: Support the Developer. If you like Suila, you can buy the developer a coffee from Settings or after an export. Every feature stays free.
• Fixed: on speed-changed clips the face mosaic could drift off the face, and on a filled or zoomed clip the face box was smaller than the area actually covered. Both are fixed.
• Other improvements: adjusting an effect or releasing a slider no longer flashes the preview black.
1.9.0 7 Sept
Face mosaic fix — please update!
• Fixed: from 1.7.1 through 1.8.2, the face mosaic only marked faces without actually covering them, in both the preview and the export. This version fixes it. If you exported a video with the mosaic on, please export it again with this version.
• New canvas ratios 4:5, 3:4 and 4:3, each labeled with the platforms it suits; safe-area guides now appear only on the 9:16 portrait canvas.
• Other improvements: caption files (.srt) are now exported from the caption panel.
1.8.3 4 Sept
Cover text is here — a friend wished for it!
• Cover text: the cover editor now has two tabs, Frame and Text. Add as many titles as you like, pick from all 63 fonts (tap to download any you don't have yet), adjust size, color, outline and shadow, and drag, pinch and rotate them right on the preview. Close the panel and it takes effect.
• Fixed: exports could fail or get stuck if you switched to another app or locked the screen mid-export. A short absence now finishes normally; after a long one the app tells you clearly, and exporting again when you're back just works.
• Other improvements.
1.8.2 2 Sept
Fonts, expanded — 63 Traditional Chinese, Japanese, Korean and Latin faces download on demand, and the app itself shrinks to about 20 MB.
• Font catalog: the Font tab now offers 63 faces (Traditional Chinese, Simplified Chinese, Japanese, Korean, Latin). Tap one to download it; it applies the moment it lands. Only Noto Sans TC ships inside the app — everything else downloads when you first use it, so the install is much smaller.
• Faster picking: language chips at the top filter the grid, and every card shows a sample in the font itself, so you can see what it looks like before you download.
• Missing fonts speak up: opening a project that uses a font you don't have shows a notice and draws it in the default font for now; Export asks once more before it renders; removing a font tells you how many texts in this project — and how many other projects — use it.
• Settings › Storage: see what the media-optimization cache, downloaded fonts and the translation model each take up, and clear any of them on its own.
• A website button (the droplet) on the home screen opens suila.app's guides and templates inside the app.
• Panels are solid now, so their controls read better; Export works while the Text panel is open.
• Other bug fixes and stability improvements.
1.8.1 30 Aug
Captions get a big upgrade — bilingual captions, on-device translation and polish, a personal vocabulary that learns your names — plus custom colors with an eyedropper that picks straight off your video.
• Translate captions (on device): tap Translate in the caption panel to turn the whole transcript into Japanese, Simplified Chinese, English, Korean or Spanish. Runs on your phone with an open-weight language model (Gemma) — your captions are never uploaded. The model (about 4.2 GB) downloads once on first use; needs an iPhone 15 Pro, any iPhone 16 or newer (8 GB memory), or an iPad with M1 or later.
• Bilingual captions: every caption can carry a second language on its own line, with its own size, color and above/below position. SRT export includes both lines.
• Smarter Polish: proofreading now runs on the same on-device model and catches sound-alike typos, punctuation and Taiwanese phrasing — you review each suggestion before it's applied.
• SRT import & export: bring subtitles in from a file, or hand them to another app.
• Personal Vocabulary: correct a name in a caption twice and Suila remembers it — the next transcript uses your spelling. See, add or remove words in Settings.
• Custom colors & eyedropper: text, captions and outlines take any color — dial one in with hue/saturation/brightness sliders, or pick it straight off the video frame. Your recent colors stay in the swatch row.
• Style panels regrouped: fill, outline, shadow and spacing now sit in clear cards, with the outline and shadow switches right in their headers.
• Editing polish: the 2.0 s transition setting now renders at 2.0 s; the project-wide Filter and Adjust panels tell you which clips have their own settings; drag snapping with haptic feedback; a two-finger pinch no longer rotates by accident.
• Other bug fixes and stability improvements.
1.8.0 27 Aug
This update brings export stability and live color preview — plus official sticker packs you can download right in the app!
• Export fix: projects with face mosaics (especially many clips with speed changes) could fail to export — fixed, with far lower memory use.
• Live color preview: the picture updates as you drag the filter and adjustment sliders — no more letting go to see the change.
• Official Sticker Packs: tap + in the sticker panel to browse and download official packs; installed ones show "Added", and "Update" when a new version is out.
• Caption model download: generating captions for the first time now shows real download progress instead of sitting at 0%.
• Truer waveforms: audio waveforms now follow the actual loudness, so beat-matching is easier.
• Other bug fixes and stability improvements.
1.7.1 21 Aug
The big sticker update — plus Freeze, by popular request!
• Your stickers, made by you: turn images or GIFs into sticker packs in the Sticker Workshop on our website, then scan a QR code, AirDrop or tap a link to add them to Suila — and share them with friends.
• Animated stickers: stickers that move! They play right in the panel — tap one to drop it into your video.
• Sticker search: however many you collect, find any sticker by name or keyword.
• Freeze: hold the video on exactly the frame you want (a wishlist feature).
• A whole new timeline: every clip now shows its real consecutive frames, so you can see where to cut at a glance.
• Smoother dragging: stickers and text show a translucent preview while you move them, so you see where they'll land first.
• Start a project with a square video and the canvas is square too — no more black bars.
• Recording fixes: a duration occasionally recorded too long and a counter that ran fast during recording are both fixed.
• Effect fix: some effects occasionally showed no effect on newer iPhones.
• Other bug fixes and stability improvements.
1.7.0 18 Aug
• Auto captions can pick their source: caption the recording or the picture-in-picture — your choice. A recording is the cleanest speech, so the captions come out best.
• A 15th effect, Halftone: colour print screens whose dots grow finer as you lower the strength, for an offset-print look.
• Fixed a recording that occasionally ran to the end without landing on the timeline.
• When the system hiccups mid-export, the export now retries itself once — most of the time you'll never know, beyond it taking a little longer.
• A save to your photo library interrupted by the system retries automatically; if it still fails, the finished video is kept so "Save Again" costs seconds instead of re-exporting.
• Clearer export failures: running out of space, running out of memory and an overheating device each say what happened and what to do.
• Deleting a clip no longer asks first — it's always undoable. Deleting a project now does ask, because it takes the imported media with it and cannot be undone.
• Other improvements: fonts are listed by their full names, the caption panel's messages are no longer hidden behind the panel, and the project list no longer flickers when you swipe to delete.
1.6.1 7 Aug
• New "Effects": the toolbar's Animation button is now Effects — 14 looping styles in four categories, Mood, Retro, Motion, and Texture (Vignette, Light Leak, Dreamy, Film Grain, VHS, Old Film, Shake, Pulse, Strobe, Glitch, Speed Lines, Pixelate, Chromatic, Scanlines), each with strength and speed. Every thumbnail previews on your own frame, so you see it before you pick it; the old fade in/out moved into the panel's "In & Out" tab.
• New "Voiceover": tap Voiceover in the toolbar and, after a 3-second countdown, record narration while the preview plays. Takes land on their own track — trim, volume, and fades work like any audio clip.
• Built-in teleprompter: paste your script and it shows over the top of the preview while you record, with three text sizes and manual scrolling. Botched a take? Tap "Delete Last Segment" — the playhead jumps back to the start of the take so you can retry right away.
• New "Mute track": every lane now has a speaker button at its head. One tap silences the whole track (exports match), and clip volume settings are kept.
• Duplicate a project: long-press a project in the library to make a copy — a safety net before big edits. Your footage isn't duplicated, so the copy takes almost no space.
• Auto-caption line breaks, rebuilt: lines break only at word boundaries and follow punctuation, numbers stay with their units, and connectives like "so" and "then" lead the next line instead of dangling at the end of the last one. Long sentences read far better, especially in Chinese.
• Caption "Polish" no longer just disappears: when it's off or the model is still downloading, the panel says why and where to turn it on.
• Smarter storage for caption language models: languages you haven't installed or used are given up first, so the ones you rely on aren't dropped.
• Fixed: the cover no longer goes missing after undoing a cover change; adding music no longer stacks on top of existing music — it snaps in right after it.
• Polished: a clearer import icon, empty-project hints no longer run to the screen edge, and export failure messages say more about what went wrong.
1.6.0 4 Aug
• New "Cover": tap the Cover card at the start of the timeline and pick a video frame (filters and captions included) or a photo from your library as the video's cover — platforms that grab the first frame for the thumbnail will use it.
• Fixed an export that could hang indefinitely on iOS 27.
• When a clip lives in iCloud and you're offline, Suila now says so and shows download progress instead of a blank preview.
• Fixed text, stickers, and picture-in-picture disappearing when media was missing.
• The export frame is easier to see: content outside the canvas is marked with a border and dimming.
• On older devices that can't run auto-captions, Suila now says it isn't supported on this device instead of a misleading error.
1.5.4 24 Jul
• Clip audio can now fade in and out too — not just the music track.
• Import a video right where you want it: move the playhead and the imported clip drops in at the nearest cut, pushing everything after it along.
• Select a caption and drag it straight on the preview — no need to open the caption panel first, and all captions move together.
• Redesigned watermark panel: pick the position on a mini-canvas, with a tidier layout.
• The "Remove" buttons across panels moved out of spots that were easy to tap by accident.
• The preview no longer goes black during an export — it shows the current frame.
1.5.3 18 Jul
• Fixed slow-motion and speed-change clips that could make an export freeze or stop partway (most noticeable with 4K video). Slow motion and speed changes work as before.
• A new project now takes its canvas orientation — portrait or landscape — from the first video you add (or the first photo if there's no video).
1.5.2 17 Jul
• Fixed exports that could freeze at a certain percentage: preview resources are released before exporting and the screen stays awake throughout; if an export still stops making progress, it now stops itself with a message so you can retry right away.
• New "Report a Problem" when an export fails: send us the error details by email with a tap, helping us find the cause faster.
• Much better hardware keyboard input: Enter commits, Shift+Enter adds a line break; character picking in Zhuyin and other input methods is no longer interrupted.
• Smoother caption editing: selecting and switching caption rows no longer interrupts editing or drops the keyboard; adding a row on iPhone no longer bounces the panel.
• Fixed a black screen and failing project saves in certain situations.
1.5.1 17 Jul
• New Reverse: pick a video clip and play it backwards with a tap — picture and sound reverse together.
• New Full Screen preview: tap the expand button for immersive playback; turn your phone sideways to fill the screen with landscape videos.
• New Duplicate: copy video and picture-in-picture clips in a tap — speed, filters, animations and other settings come along.
• Some messages now show as non-intrusive floating notices — clearer and less disruptive.
1.5.0 15 Jul
• High-resolution videos now optimize automatically in the background
• New Format option at export: Most Compatible (H.264) / High Efficiency (HEVC)
• New clip animations: fade or blur-fade in and out, with adjustable duration
• New keyframe easing curves: Overshoot and Wind Up
• New projects open straight into the media picker
• Export picks up ongoing optimization progress
• Manage the media optimization cache in Settings
• Videos edited in Photos re-optimize automatically
• Smoother playback while a text or sticker is selected
1.4.0 14 Jul
• Fixed exported videos drifting out of sync when using speed curves: audio gradually mismatched the picture and stray sound appeared at the very end (preview was fine — only export was affected).
• When only some photos are shared with Suila, picking items outside that selection now explains why — and you can share those photos right there (the import continues automatically) or allow full access.
• Fixed projects with picture-in-picture failing to open after photo access was turned off, showing only an English error. Projects now open normally and mark the missing media.
• When media can't be loaded, Suila now tells you why: no photo access, not shared with Suila, or deleted from your library — permission issues can be fixed with a tap right on screen.
• Photo permission messages are now fully localized in all six languages, and the system's repeated access reminder no longer pops up.
• New System Settings shortcut on the Settings page: one tap opens Suila's page in the system Settings to adjust photo access.
1.3.3 12 Jul
• Keyframes, overhauled: the add/remove button now lives on the playback bar, so you can scrub freely while animating; text and stickers can be keyframed too; new easing curves (new keyframes default to ease-in-out); trimming or splitting no longer shifts your animation timing; and timeline markers are now orange diamonds, much easier to spot.
• Stickers go multi-track: stack several stickers over the same moment, each on its own lane; long-press to drag between lanes — lane order is the front-to-back order on screen.
• Text styling that sticks: new text starts with the style you last used; the style panel gains Apply to All; and a new Duplicate button copies a text, style and all.
• Text stacking limit raised to 10 lanes, so you can layer more text over the same moment.
• The watermark can avoid social media UI: turn it on and it steers clear of IG/TikTok/Shorts titles, captions, and side buttons.
• Canvas snapping: dragging text, stickers, or picture-in-picture snaps to the canvas center, with bright guide lines and a gentle tap.
• New sharp-cornered square mask for picture-in-picture (the old square is now “Rounded”); selecting a masked clip outlines the masked area directly.
• Fixed picture-in-picture pinch zoom getting stuck after repeated zooms; the ceiling is now 8×.
• A clearer timeline: after trimming the main track the playhead parks on the cut; shortening a video no longer pushes tail text and stickers off the end — anything left hanging past the end dims until you pull it back in.
• Dragging a text onto an overlap springs it back immediately.
• Fixed audio fade-out staying on after being set back to 0 (the slider now snaps to whole seconds).
1.3.2 10 Jul
• Multi-track text: stack several text layers over the same moment and edit each on its own; long-press a text block to drag it between lanes. Every timeline track now has a tinted background, so the lanes are easy to tell apart.
• Outline & shadow, your way: give text and captions an outline (pick its color and thickness) and a shadow (adjustable softness) — or combine the background pill with a shadow to make the text float. Clean or bold, your call.
• Caption size in one tap: select a caption and the Size button is right there in the toolbar — no need to open the style panel.
• Boost the volume up to 200%: music, video, and picture-in-picture audio can all be turned up, so quiet clips are rescuable.
• Regrouped style panels: dividers now sort placement, color, outline/shadow, and size so controls are easier to find.
• Trimming that closes up: trim a clip's start or end and the main track ripples to fit — shorten it and the clips after slide in, extend it and they make room. No more leftover gaps.
• Waveforms hold still while you trim: dragging an audio handle no longer stretches the waveform, so you can line the edge up with a beat or a quiet spot.
• Longer transitions, with snap points: transitions now run up to 2 seconds, and the length slider snaps to 0.3 / 0.5 / 1 / 1.5 / 2s.
• Easier edits on long videos: with a clip selected, playback stops at its end (play again to re-listen), deleting drops the playhead right on the new join, and scrubbing away deselects — so you never delete something far offscreen.
• Tap it, see it: tapping a clip, text, sticker, or caption far from the playhead brings the playhead over, so the preview shows what you just picked.
• Fixes: prompts and error messages now follow the in-app language, text lanes warn you when full, the caption size panel closes when you switch selection, and more.
1.3.1 8 Jul
• Suila comes to iPad: a layout built for the big screen — tool panels sit beside the preview, a taller timeline shows more tracks at once, with keyboard shortcuts, timeline zoom buttons, and trackpad support.
• New built-in handwritten font: ChenYuluoyan (辰宇落雁體) gives Chinese titles and captions a warm, hand-lettered feel.
• Drag captions anywhere: place captions right on the preview — long and short lines stay aligned, and the top/middle/bottom presets are still one tap away.
• Face mosaic now works on photos; the "protect your star" face boxes are placed precisely and only appear when you need to tap them.
• Clearer filters & adjust: a single clip can keep its own settings or follow the project with one tap.
• Fixes: a stray frame from the previous clip while scrubbing fast, the iPad keyboard pushing the layout around, untranslated labels, and more.
1.3.0 7 Jul
• Bigger, bolder transitions: 7 new effects — blur dissolve, flash zoom, whip pan (with real directional motion blur), circle wipe, glitch, pixelate, and swirl (19 in all).
• Watermark: put your name or brand — text or a logo image — on your video; position, size, and opacity are yours, shown the whole way through.
• Underwater rescue: one tap restores the red the water swallowed; tune strength and dehaze separately, and hold to preview the original for a quick before/after.
• Movable picture-in-picture mask: drag and pinch it right on the preview; double-tap to recenter.
• Smoother text: rotation snaps to straight angles, remove text right from the style panel, and font previews are easy to tell apart.
• A new Tint control in color adjust, plus snap points on every slider for landing on common values.
• New projects are named in your language, with performance improvements and bug fixes throughout.
1.2.6 4 Jul
• Reorder your clips: Long-press any clip to open the reorder panel, then drag to rearrange — captions move along with their clips automatically.
• No more black gaps: Deleting a clip now closes the gap automatically. Older projects with gaps? Fix them with one tap when you open the project — and playback no longer stalls at gaps.
• A big upgrade for caption editing: Edit text right in the list, merge lines up or down, split at the cursor, or insert new lines. Fonts get their own tab, styles gain alignment options, and you can now generate captions from either the main video or the picture-in-picture audio.
• Captions that follow your video: Captions generated from a picture-in-picture clip automatically adjust when you move, trim, or delete that clip.
• Faster text entry: Tap "Text" to jump straight into the editing panel and start typing — no extra screen in between. The style panel is also more compact and easier to read.
• A gentle reminder on the home screen when a new version is available (dismissible).
1.2.5 3 Jul
• Letter & line spacing for text: fine-tune the gaps between letters and between lines for cleaner-looking text.
• Size & opacity for text and stickers: select one and adjust it with a slider right in the toolbar — as big or as faded as you like.
• Split text/stickers at the playhead: cut a text or sticker into two at the playhead and fine-tune each half.
• Easier timeline editing: text, sticker, and caption blocks are taller and now have trim handles at both ends, just like video clips, for more precise timing.
• A smarter, cleaner interface: selecting music or a sound effect shows only the tools that apply, and panels close automatically when your selection changes.
1.2.4 1 Jul
Exports from iPhone 16 and later that failed now go through
• Export fix: videos shot on iPhone 16 or later carry Spatial Audio, and after a crop or trim saved from the Photos app they failed to export in Suila (error -12780) unless the clip was muted. Suila now uses the stereo track the video already includes, so these clips export directly, sound and all. Thanks to everyone who reported it.
• iPhone Duo unfolded: the editor gives the panel the full height and scales the timeline proportionally, so the preview is no longer squeezed.
• One less hitch when opening the editor.
more Version 1.11.1 2 days ago
Data Not Collected The developer does not collect any data from this app.