SRT to ASS Converter

Upload a SubRip (.srt) subtitle file and instantly download it as an Advanced SubStation Alpha (.ass) file. Timestamps, text, and inline formatting tags are all preserved.

Upload SRT File

Supported: .srt (UTF-8). Drag and drop or choose a file.

.SRT.ASS

Drop your SRT file here

or click to browse

Upload an SRT file to preview subtitle cues and download as ASS.

Fast, Private SRT to ASS Conversion

Upload your SubRip file and get a ready-to-use ASS file in seconds. No account needed. No file uploads. Everything runs in your browser.

Instant Conversion

Convert SRT to ASS in milliseconds — entirely in your browser. No server uploads, no waiting, no file size limits.

Formatting Preserved

SRT inline tags (, , ) are automatically converted to ASS override codes ({\b1}, {\i1}, {\u1}), so styled text carries over correctly.

Accurate Timestamps

All start and end times are converted precisely from SRT format (HH:MM:SS,mmm) to ASS centisecond format (H:MM:SS.cc). No drift, no rounding errors.

One-Click Download

Preview all subtitle cues after uploading, then download the converted ASS file with a single click. Free, with no account required.

How to Convert SRT to ASS

1
Upload your SRT file
Drag and drop your SubRip file onto the upload area, or click to open the file browser.
2
Preview the subtitle cues
The tool immediately parses your SRT file and shows all subtitle cues with their timestamps in the preview panel.
3
Download the ASS file
Click "Download ASS" to save the converted file. Timestamps are reformatted to centisecond precision and a default style sheet is included.

Frequently Asked Questions

What is the ASS subtitle format?: ASS (Advanced SubStation Alpha) is a feature-rich subtitle format widely used in anime fansubs and supported by media players such as VLC, MPC-HC, and mpv. Unlike SRT, ASS supports per-cue positioning, colours, fonts, karaoke effects, and other typographic controls via its [V4+ Styles] and [Events] sections.
What is the difference between SRT and ASS?: SRT (SubRip) is a minimal format: sequential cue numbers, HH:MM:SS,mmm timestamps, plain text, and basic HTML-like tags. ASS is much richer: it stores a default style sheet, supports per-dialogue override codes, and uses centisecond precision (H:MM:SS.cc). If you need advanced styling or are working with anime subtitles, ASS is typically required.
Will bold, italic, or underline formatting be converted?: Yes. SRT inline tags such as …, …, and … are automatically translated to their ASS equivalents ({\b1}…{\b0}, {\i1}…{\i0}, {\u1}…{\u0}). Basic tags are also converted where possible.
Does this tool upload my file to a server?: No. The entire conversion happens locally in your browser using JavaScript. Your file never leaves your device, which makes it completely private and available offline.
Which media players support ASS subtitles?: Most desktop media players support ASS natively, including VLC, mpv, MPC-HC, and MPC-BE. Some streaming devices and smart TVs may require the subtitle stream to be burned into the video or converted back to SRT. Web browsers do not support ASS in the HTML5 <track> element — use VTT for web playback.