WebFaz Subtitles

Fix subtitles while watching the video, in the browser

PT

Local by default. Only if you turn on AI is o texto das falas, somente ao clicar em Traduzir legenda sent to Groq. Learn more

Fix subtitles while watching the video, in the browser

Open the subtitles and the reference video in the same place: click a line to go to the passage, fix the text or the times, add or delete lines and apply the corrections before downloading. The video and the subtitles stay in your browser.

Open or drag a subtitle, ZIP or videoSubtitles up to 5 MB · ZIP up to 256 MB · MP4/MOV and MKV/WebM up to 2 GB

Files stay on your device.

Input

JSON: array of objects with start and end in seconds and text with the line. TXT and Markdown: each non-empty line becomes a block.

Output

Watch and fix the subtitles

Video and editing stay on the device. Review text and times and apply the corrections before sending.

Subtitle lines

0 of 0 lines

Open a subtitle or use Add line to create from scratch.

Reading review · 0 line(s) with warnings

Warnings help review long lines, fast reading, more than two lines, durations and overlaps. They are adjustable references, do not block export and may be intentional in dialogue.

The output uses the applied corrections.

Continue in the video editor or the text editor.

How to do it, step by step

  1. Open or drag the subtitle file.
  2. In the Watch and fix the subtitles tab, open the reference video.
  3. Click a line, fix the text or the times and use Apply corrections.
  4. Choose the output format and download.

See where to click, with an image of the tool →

When this is useful

Fix errors in automatically generated subtitles

Listen to the passage and adjust the line’s text.

Adjust the start and end of the lines

See the line on screen and adjust the times until it is right.

Tips for a good result

  • Apply or discard the corrections before downloading, translating or sending to another app.
  • For subtitles generated by WebFaz Transcription, use the “Send to” button and continue here.

What this tool does not do

  • The corrections only take effect after “Apply corrections”: without that, the download is blocked.
  • Subtitle files of up to 5 MB; ZIP of up to 256 MB; video of up to 2 GB.
  • Everything happens in the browser: the file is not sent. The only exception is the optional translation, which sends only the text of the lines.

Frequently asked questions

Is the video sent anywhere?
No. The video stays in the browser, only as a reference for you to check the lines.
Do I need the video?
It is not required, but it makes it easier to check the speech and the timing of each passage.

More Subtitles tools

Text written by Marcelo Amantino · updated October 18, 2026 · who we are