Subtitle and caption editor
Edit subtitles and captions in your browser, on your own machine. Nothing uploads: the file you open stays on your disk, and so does any video you check it against. Editing, quality control and the four core subtitle formats are free; the six broadcast formats and the video player need Pro.
Editing cue by cue
The editor is a grid, one row per cue, with text, start and end. Arrow keys move between cells, Enter opens one, Escape backs out, and Ctrl+Z undoes anything. Split a cue, merge two, or delete one without leaving the keyboard.
Styling is opt-in per cue. Open the advanced editor on a cue and you get italics, bold, underline, colour and line breaks as real formatting instead of tags you type by hand. What’s offered depends on what your source format can actually express, so you can’t apply a colour to a format with nowhere to put it. That part is free.
QC while you edit
A QC pass runs against a preset and lists what it found, cue by cue. Twenty checks ship today, among them line length, characters per second, cue duration, gaps, overlaps, reversed timing, empty and duplicate cues, unclosed tags, forbidden characters, and a set specific to right-to-left text including bidi punctuation, kashida stripping and Latin-run isolation.
Four presets ship. Netflix Latin and Netflix Arabic are cited to the published Netflix specs; the YouTube and generic presets are our own drafts, and the picker labels them that way rather than implying an authority they don’t have.
Most issues have a fix button. A fixer that would introduce a new issue anywhere else in the file is reverted automatically, so a fix never trades one problem for another. Running QC is free; exporting the report as a file needs Pro.
Timing and sync
Shift every cue by an offset, or stretch a range linearly between two anchors. Both are free.
Frame-rate conversion, drift correction and automatic resync against an audio track are Pro, as is loading a video to check the result. Auto-resync aligns your cues to speech by cross-correlation, on your machine; the audio never leaves it either.
Keyboard shortcuts
| Keys | Action |
|---|---|
| ↑ ↓ ← → | Move between cells |
| Enter | Edit the focused cell (also Space or F2) |
| Ctrl Enter | Commit a multi-line text edit |
| Esc | Cancel the current edit |
| Ctrl Z | Undo |
| Alt ↓ | Next issue |
| Alt ↑ | Previous issue |
| Alt Enter | Fix the current issue and advance |
What it isn’t
Two things worth saying before you try it. It won’t burn subtitles into a video, and there’s no multi-user editing: one person, one browser, one file at a time.
Frequently asked questions
Is there a free subtitle editor here?
Yes. The cue grid, all twenty QC checks, the four presets, auto-fix and per-cue styling are free, with no account and no watermark. Pro adds the video player, frame-rate and drift correction, auto-resync, transcription, the six broadcast formats and QC report export.
Can I edit subtitles online without uploading them?
That’s the only way this works. The page loads once, then your browser opens, edits and saves the file; nothing is sent to a server, and it keeps working with the network off.
Which subtitle formats can I edit?
SRT, WebVTT, SBV and ASS on the free tier. Scenarist SCC, MacCaption MCC, EBU-STL, EBU-TT-D, TTML and Apple iTT with Pro. Every format both reads and writes, so you can open one and save another.
Can I check captions against a video?
Yes, with Pro. Load a local video and the cues overlay it with a waveform and a timeline. The video is never uploaded; CueForge keeps a handle to the file rather than a copy of it.
Browse every subtitle converter · Read the caption compliance guides · Open the CueForge studio →