WebFaz Subtitles

SRT to ASS

PT

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SRT to ASS: convert subtitles and set font, color and position

ASS lets you define the font, size, color and position of the subtitles. Open the SRT and download the ASS with a single style, which you set in the Adjust timing tab. The conversion happens in the browser, without sending the file.

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

Adjust timing for conversion

Basic ASS/SSA style

A single style will be applied to all lines, with a black outline. Use your video’s resolution. Times will be rounded to 0.01 second. Original effects and styles are not preserved.

Continue in the video editor or the text editor.

How to do it, step by step

  1. Open or drag the .srt file.
  2. In the Adjust timing tab, choose font, size, color, position and your video’s resolution.
  3. Check the result in the Output box.
  4. Click Download ASS.

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

When this is useful

Burn the subtitles into the video with your own style

Editing programs and players accept ASS and use the style defined.

Change the subtitle position or color

Choose, for example, the center position or another text color.

Tips for a good result

  • Use your video’s resolution (by default, 1920×1080) so the font size is proportional.
  • The font must be installed on the device that plays the video.

What this tool does not do

  • A single style is applied to all lines (by default, Arial 48, white text with a black outline).
  • Italics and bold from the SRT do not carry over to the ASS: the tags are removed.
  • Times are rounded to hundredths of a second.
  • Original effects and styles are not preserved.
  • 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

Can I have different styles per line?
No. The app applies a basic style to all the lines.
Why does the resolution matter?
The ASS font size is relative to the resolution defined in the file: if it differs from the video’s, the subtitles may appear bigger or smaller.

More Subtitles tools

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