Convert SRT to ASS online and get a styled subtitle script ready for Aegisub, mpv and MKV. Upload files up to 20GB and download the converted result in a few clicks.
Convert ASS to SRTDrag & Drop your SRT file here
SRT files, up to 20GB
Files stay private.
Automatically deleted after 24 hours.
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20GB upload limit.
4.8/5
Trusted for 1,827,796+ conversions
HOW IT WORKS
Three steps, no account, nothing to install.
01
Upload your SRT file
Drag and drop a .srt file or select it from your device. Its text encoding is detected automatically.
02
Convert to ASS
Keep ASS as the output format and start. Each subtitle becomes a Dialogue line in the Default style, and bold, italic, underline and font colors become ASS codes.
03
Download the ASS
Download the UTF-8 .ass script and use it as it is, or open it in Aegisub to restyle it.
SRT
SRT (SubRip) is the most common subtitle format: a plain-text list of numbered subtitles, each with a start and end time. It supports only simple bold, italic, underline and font color tags, and the player decides how the text looks.
ASS
ASS (Advanced SubStation Alpha) is a subtitle script format that stores styles, fonts, colors, positions and effects alongside timed dialogue. Aegisub edits it, players such as mpv, VLC and MPC-HC show it with its styling, and it is the usual styled subtitle track in MKV files.
FILE FORMATS
SOURCE
SubRip Text began with the SubRip ripping tool in the early 2000s. Each subtitle is a number, a start and end time with a comma before the milliseconds, and one or more lines of text. Premiere Pro, DaVinci Resolve, VLC, smart TVs, YouTube, Facebook and LinkedIn all accept SRT.
TARGET
Advanced SubStation Alpha is the styled subtitle format of anime fansubs and Aegisub. An ASS script defines named styles with fonts, colors, outlines and shadows, and override tags place, animate and fade text anywhere on screen, including karaoke effects and typeset signs. VLC, mpv and MKV players render it.
| Feature | SRT | ASS |
|---|---|---|
| Developed by | SubRip (community) | SubStation Alpha community (Aegisub) |
| File extension | .srt | .ass |
| Styling | Basic bold, italic, underline | Fonts, colors, outlines, effects |
| Positioning | No (some players read {\an8}) | Yes, exact positions |
| Best for | Editors, TVs, uploads | Styled subtitles and fansubs |
| Works in | Almost every player and site | VLC, mpv, MKV players |
USE CASES
Practical workflows where SRT to ASS conversion is useful.
Start a styled fansub from a timed SRT
Open the ASS in Aegisub and edit the Default style or add signs, instead of timing the dialogue again from scratch.
Burn subtitles into a video
FFmpeg and HandBrake burn an ASS script in with its style, so the hard-coded subtitles come out as white Arial text with a black outline at the bottom.
Add a styled subtitle track to an MKV
Mux the .ass into an MKV with MKVToolNix, so players that render ASS show the subtitles with the same look.
Restyle every line at once for social clips
Every subtitle uses the same Default style, a normal subtitle size at the bottom of the frame. For bigger captions on social clips, raise its font size once in Aegisub and every line follows.
Keep top-of-screen subtitles
Subtitles marked {\an8} in the SRT, often moved up so they don't cover on-screen text, stay at the top in the ASS.
Keep speaker colors
Colors from <font color> tags are converted to ASS color codes, so color-coded speakers in an SRT keep their colors.
Restore SRTs made from ASS
SRTs exported from ASS scripts often contain \N and \h codes. Converting them back gives an ASS where they work as line breaks and hard spaces again.
Fix symbols in old English SRTs
Encoding detection handles English files whose only special characters are symbols such as £, € or °, and the ASS comes out in UTF-8.
Give every language the same look
Translation teams that deliver one SRT per language get ASS scripts that share the same Default style, so burned-in versions look alike in every language.
Make subtitles look the same across players
The styling travels with the ASS file, so mpv and other ASS-aware players show the same font and outline instead of their own defaults.
SUPPORTED FILES
SRT files in any common encoding are supported.
Any SRT from editors, downloads or rips.
Formatting is carried into the script.
Encoding is detected; the ASS is written as UTF-8.
Ready to add with MKVToolNix.
Upload several SRTs and download the ASS scripts as a ZIP.
TROUBLESHOOTING
Most issues come from features one format has and the other doesn't.
01
The Default style is fixed during conversion. Change the font, size or colors in Aegisub afterwards.
02
The style is sized for 1920x1080. Adjust PlayResX and PlayResY or the font size in Aegisub.
03
Many TVs don't render ASS. Keep the SRT for TVs.
04
Subtitle files over 50 MB are refused. Real subtitle files are far smaller.
05
The encoding is detected automatically. A very short file whose only accented letters fit several code pages can be misread; re-save it as UTF-8 and convert again.
06
Video files, picture-based subtitles and other binary files renamed as subtitles are refused with a message saying what they are.
Subtitle Edit and Aegisub are full subtitle editors. dragdropdo is built for converting SRT to ASS quickly, from any device.
| What matters | dragdropdo | Subtitle Edit and Aegisub |
|---|---|---|
| Nothing to install | ✓Yes. Runs in any modern browser. | ~Yes, a desktop download. |
| Works on phones and tablets | ✓Yes. Desktop, Android, iPhone and iPad. | ~No. Windows, Mac and Linux only. |
| Batch conversion | ✓Yes. Add many files and download one ZIP. | ~Subtitle Edit has a batch converter; Aegisub doesn't. |
| Share finished files | ✓Yes. Send a unique link from the result page. | ~You upload and share the files yourself. |
| Pricing | ✓Free with daily limits. $2.99 or $6.99 passes for unlimited use, no monthly plan. | ~Free. |
| Editing timing and text | ✓Not in the converter. Edit the SRT afterwards if needed. | ~Yes. Full timing and text editing. |
Other tools use different pricing, limits and workflows. This comparison describes dragdropdo's own features without assuming every other tool works the same way.
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WHY DRAGDROPDO
Convert SRT to ASS in your browser, with nothing to install and nothing kept after 24 hours.
Private by default
Files are encrypted in transit and deleted from our servers automatically after 24 hours.
No install required
Convert in any modern browser on Windows, Mac, Linux, Android, iPhone or iPad. No app and no sign-up wall.
Big files and batches
Upload files up to 20GB each, add several at once, and download the results one by one or as a ZIP.
Share & download
Save finished files to your device or pass them on with a share link from the result page.
MORE SRT TOOLS
SRT (SubRip Subtitle) files are widely used for storing subtitle information for videos. This plain text format contains time codes and subtitle texts, making it easy to synchronize dialogue with on-screen content. Ideal for video editing, broadcasting, and media player applications. Easy to create and edit, SRT files enhance the viewing experience by providing essential dialogue context in multiple languages.
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FAQ
Answers to common questions about dragdropdo's SRT to ASS converter.
