SRT to ASS Converter

Online Converter: Convert SRT file into ASS format

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Subtitles Converters

Convert SRT subtitle files to ASS (Advanced SubStation Alpha) format to take advantage of rich styling, positioning, and effects. ASS is widely used in anime fansubbing, karaoke, and any project where subtitles need to be more than plain text on screen.

The converter generates a valid ASS file with a default style that you can customize in Aegisub or any ASS-compatible editor. All SRT timing and text content is preserved.

Why Convert SRT to ASS?

Add Styling: Apply fonts, colors, outlines, and shadows that SRT cannot represent.
Screen Positioning: Place subtitles at specific coordinates — useful for signs, on-screen text, or avoiding overlapping UI.
Multiple Speakers: Assign different visual styles to different characters or speakers.
Aegisub Workflow: Import into Aegisub for advanced timing, typesetting, and karaoke authoring.
Anime and Fansub Projects: ASS is the standard format for styled anime subtitles.

What the Converter Generates

The output ASS file includes:

A [Script Info] section with v4.00+ script type
A [V4+ Styles] section with a Default style (Arial 20pt, white text)
A [Events] section with each SRT cue converted to a Dialogue line

Timing is converted from SRT millisecond format (HH:MM:SS,mmm) to ASS centisecond format (H:MM:SS.cc). Multiline subtitles use ASS \N line breaks.

Related Subtitle Converters

ASS to SRT - Convert ASS back to SRT
VTT to ASS - Convert WebVTT to ASS
Excel to ASS - Create ASS from a spreadsheet
SRT to VTT - Convert SRT to WebVTT

Frequently Asked Questions

Can I customize the ASS style after conversion?

Yes. Open the converted file in Aegisub or a text editor to modify fonts, colors, positioning, and other style properties. The Default style is a starting point you can adjust.

Is timing precision lost in the conversion?

SRT uses milliseconds (3 decimal places) while ASS uses centiseconds (2 decimal places). The last digit of milliseconds is rounded, which is imperceptible in practice — a maximum difference of 5ms.

Is my data secure?

Yes. All uploads use HTTPS encryption. Source files are deleted immediately after conversion, and results are removed within 24 hours.

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Conversion time varies by file size; thank you for your patience.
Limits apply to maximum conversions and file size. See available plans on the Pricing page.
Unregistered users: up to 5 conversions/day, up to 50 conversions/month, and 10 MB per file. Sign up to extend your limits.
Need help converting files? Contact us.