HeroTools / Media
Local · Private · Free

Subtitle Editor (SRT/VTT)

Open an .srt or .vtt, fix the text, shift & scale the timing for framerate sync, validate overlaps and export back — entirely on your device.

⬆
Drop an .srt or .vtt file here
or click to browse
🔒 Files never leave your browser

Timing tools

Presets apply instantly — factor = source fps ÷ target fps (23.976 → 25 = 0.95904).

Find & replace

Validation

—
#StartEndDurText
Times accept 00:01:02,345 or 00:01:02.345 — both SRT and VTT styles.

About Subtitle Editor (SRT/VTT)

Subtitle Editor (SRT/VTT) is a free, private media tool that runs entirely in your web browser. Edit subtitles, shift & stretch timestamps, fix sync and convert SRT ↔ VTT — locally. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for srt editor, subtitle editor, shift subtitles, srt to vtt. Like every HeroTool by Digital Heroes, Subtitle Editor (SRT/VTT) is 100% free with no limits.

How to use Subtitle Editor (SRT/VTT)

  1. Open Subtitle Editor (SRT/VTT) — it runs entirely in your browser, with no signup.
  2. Drag and drop your file (or click to browse) — it never leaves your device.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is Subtitle Editor (SRT/VTT) free?

Yes — Subtitle Editor (SRT/VTT) is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. Subtitle Editor (SRT/VTT) runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does Subtitle Editor (SRT/VTT) do?

Edit subtitles, shift & stretch timestamps, fix sync and convert SRT ↔ VTT — locally.

Related Media tools

Browse all Media tools →

⏺Screen RecorderRecord your screen (and mic) to a video file — locally.🎙Voice RecorderRecord audio from your mic and download it.🔊Text to SpeechTurn text into speech with your system voices.🎬Video Trim & GIFTrim a video or turn it into a GIF — in your browser (one-time engine download).🎚Audio Trimmer & EditorImport or record audio, trim, fade & adjust volume on a waveform — export WAV.▶YouTube Thumbnail DownloaderGrab any YouTube video’s thumbnail in every resolution — just paste the link.