Subtitle studio · launching soon
Auto-generate captions from speech, fix the words and timing, cut or merge SRT files, translate, and burn bold captions into vertical video — all in your browser.
Upload a clip, podcast or lecture recording — or bring an existing SRT, VTT or ASS file you need to fix.
Speech-to-text drafts the captions. You fix words, split long lines and nudge timing on a waveform until it lands.
Download a clean subtitle file for YouTube or your NLE, or render captions straight into a vertical video for TikTok, Reels and Shorts.
From the first rough transcript to the final burned-in export, without juggling five single-purpose tools.
Speech-to-text turns spoken audio into timed caption lines as a first draft you can correct, not a black box.
Edit text, split or join cues, and see characters-per-second warnings while you type.
Remove a section, split a file at a timestamp, or join parts back together with timings recalculated.
Fix out-of-sync subtitles with a constant offset, or stretch them between two sync points for frame-rate drift.
Create a translated track that keeps the original timing, then review it line by line.
Bold, readable caption styles positioned inside the safe area of 9:16 frames, rendered into the video.
Formats: SRT · WebVTT · ASS/SSA · burned-in MP4
Caption short-form clips fast, keep lines punchy, and burn them in so they read with the sound off.
Clean up client SRTs, conform timing after a re-cut, and hand back files that pass delivery specs.
Make lectures and tutorials accessible, fix auto-captions, and publish translated tracks for more learners.
Status: in development
We are building the studio now. There is no sign-up list yet — when early access opens, it will be announced right here on cutmysub.com. In the meantime, our guides cover auto-captioning, timing fixes and burn-in step by step.
Browse the guidesNot yet. CutMySub is in development and launching soon. Until then, the guides on our blog walk through the same subtitle tasks with tools you already have.
The plan is to import and export SRT and WebVTT, with ASS/SSA for styled captions, plus burned-in (hard-coded) captions rendered into the video file.
Speech-to-text works best on clear audio with one speaker at a time. Music, crosstalk and heavy accents lower accuracy, which is why CutMySub is built around fast correction and re-timing rather than one-click output.
Yes, vertical 9:16 video is a core use case: caption styles are designed to sit inside platform safe areas, away from the buttons and descriptions overlaid on the right and bottom of the screen.
Softsubs are a separate track or file the viewer can turn on and off. Hardsubs are drawn into the video pixels and always visible. Our guide on burning subtitles explains when to use each.
That is one of the main jobs CutMySub is for: shift all cues by an offset, or stretch timing between two reference points when the drift grows over the video.
Pricing has not been decided yet. We will publish it here before launch.
· srt
Step-by-step guide to splitting an SRT file at a timestamp, merging several SRT parts into one, and combining two subtitle tracks — with the offset and renumbering rules that keep everything in sync.
· burn-in
The difference between hardcoded (burned-in) and soft subtitles, when to use each, and step-by-step ways to burn SRT or ASS captions into a video with FFmpeg, HandBrake or your video editor.
· vertical video
Best practices for captioning vertical short-form video: how many words per caption, reading speed, where to place captions to avoid app UI, and how to style them so they're readable on a phone.