Suila — Video Editor
Speed curves, captions, music
Free · Designed for iPad. Not verified for macOS.
Suila is a completely free video editor for iPhone and iPad.
No accounts, no ads, no tracking, no personal data collected. Suila doesn't upload your videos, audio, or projects anywhere on its own — everything stays on your device.
Its signature is multi-point speed curves — bend time with a single curve for slow motion and dynamic speed changes. Cut, caption, and score your video in minutes.
Why you'll love it:
• Multi-point speed curves (signature): add control points for smooth, dynamic speed changes and slow motion.
• An intuitive timeline: split, trim both ways, long-press a clip to drag it into a new order; deleting closes the gap automatically — no black frames left behind.
• Auto captions (on-device): turn speech into captions in dozens of languages, depending on your device — Traditional Chinese, English, Japanese, Korean, Spanish, German, and more. Generate from the main video or a picture-in-picture clip; adjust length and density; edit, split, and merge by hand — and drag them anywhere on the preview.
• Auto face mosaic: detect and track faces frame by frame to mosaic or blur them; tap to keep your star unmasked, even in a crowd.
• Fonts, your way: 5 built-in commercial-use CJK typefaces (including the handwritten ChenYuluoyan), or import any .ttf/.otf of your own.
• Filters & color: cinematic LUTs plus brightness, contrast, saturation, temperature, and tint — plus one-tap underwater correction that brings back the red the water swallows.
• Text & stickers: free positioning, fonts, colors, letter & line spacing, in/out animations, and emoji.
• Transitions & keyframes: 19 transitions — dissolve, fade, push, slide, and zoom, plus whip pan, glitch, swirl, and more; animate position, scale, and opacity.
• Picture-in-Picture: layer a second video — or a photo — over your main clip, with its own audio; captions generated from it move along with it.
• Audio from video: extract any clip's soundtrack as an editable track; add music and royalty-free sound effects.
• 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.
• Canvas & end card: 9:16 / 1:1 / 16:9, plus an optional "Made with Suila" end card (free, toggle off anytime).
• 4K export: preview is export — what you see is what you get.
Cut it. Nail it.
more • 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 Aug 7
• 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 Aug 4
• 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 Jul 24
• 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 Jul 18
• 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 Jul 17
• 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 Jul 17
• 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 Jul 15
• 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 Jul 14
• 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 Jul 12
• 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 Jul 10
• 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 Jul 8
• 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 Jul 7
• 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 Jul 4
• 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 Jul 3
• 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 Jul 1
Bug fixes and performance improvements.
1.2.3 Jun 30
Bug fixes and performance improvements.
1.2.2 Jun 28
Bug fixes and performance improvements.
1.2.1 Jun 27
This update adds:
• Import your own fonts (.ttf/.otf) for titles and captions
• Extract audio from any video as an editable track
• Picture-in-Picture now accepts photos, not just video
• German added to auto captions (now 7 languages)
• More transitions: push and slide in four directions, plus zoom
• Fit or Fill a clip to the canvas in one tap
• Protect multiple faces from the mosaic at once
• Audio waveforms on the timeline for easier beat-matching
• An optional “Made with Suila” end card
Plus performance improvements and bug fixes.
1.2.0 Jun 27
• 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.
more Version 1.6.1 Aug 7
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