AllSubConverter
Browser-based subtitle toolkit for converting, editing, cleaning, syncing, checking and exporting subtitle files
Best for: creators and translators converting, cleaning and syncing subtitle files, with a free plan that runs in the browser
- Starting price
- Free plan · from $4.16/mo
- Free plan
- Yes
- Free trial
- No
- Best for
- Creators
- Checked on
- 2026-10-17
AllSubConverter supports SRT, VTT, ASS, SSA, LRC, SBV, TTML, SCC, STL, SMI, TXT and YouTube JSON3 input. Standard subtitle processing runs in the browser, with batch workflows, timing tools, quality checks and PDF export. Optional AI translation uses a user-provided API key.
Key features
- Converts between 11 subtitle formats (including SRT, VTT, ASS, LRC, TTML, SCC, STL, SMI and SBV) plus YouTube JSON3, with 40+ conversion routes
- Edit and clean tools: table editor, find and replace, line break balancing, language-aware cleaner
- Sync tools: offset shift, drift calibration, speed scaling and frame rate conversion
- Quality checks for reading speed, line length, overlaps and gaps, with a quality score
- PDF export of subtitles as timestamped tables or flowing transcripts
- AI translation, rewriting and pronunciation tools using your own API key (OpenAI, DeepSeek or Claude), with 19 target languages
What stands out
- Free forever plan with no account
- Standard tools run in your browser, so subtitle files are not uploaded
- Low-priced passes: 24 hours, monthly or annual
Trade-offs
- Not a marketing tool as such: it is a subtitle toolkit for people who work with video
- Free batch processing is capped at 5 files per operation
- AI features need your own API key, and requests go directly to your provider
Pricing
| Plan | Price | Fees | Includes |
|---|---|---|---|
| Free | $0 | Not stated |
|
| 24-hour pass | $2.99 once for 24 hours; no auto-renewal |
| |
| Monthly | $5.99 per month | Not stated |
|
| Annual | $49.99 per year $4.16 per month, billed annually | Not stated |
|
Prices are in dollars (no currency code shown). Free: forever, batch up to 5 files, no account. 24-hour pass $2.99 (one-time, no auto-renewal). Monthly $5.99 (cancel anytime, 7-day money-back guarantee). Annual $49.99 (effective $4.16 a month, 7-day money-back guarantee). The paid plans unlock unlimited batch, pipeline workflows, collections and workspace backup. No trial is listed. The page does not state limits for AI translation, and the site says it does not host, store or distribute copyrighted subtitle or video files.
Checked 2026-10-17. Source: www.allsubconverter.com. Prices change; confirm on the vendor's site before you buy.
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