Question 1

What subtitle formats are supported?

Accepted Answer

We support SRT (SubRip), VTT (WebVTT), and ASS/SSA (Advanced SubStation Alpha) subtitle formats. You can convert between these formats, translate subtitle files with AI, transcribe audio or video to subtitles, and edit SRT, VTT, or ASS files in the browser.

Question 2

How does the online Subtitle Editor work?

Accepted Answer

Open Subtitle Editor from the home page, the site header under Tools > Editors, or go to /tool/subtitle-edit. Upload a subtitle file, click any timestamp or text to edit inline, add cues after the selected row, and download as SRT, VTT, or ASS. Everything runs locally in your browser, so your file is not uploaded to our servers.

Question 3

Does the Subtitle Editor require an account?

Accepted Answer

No. The Subtitle Editor is free to use without signing in. Parsing, editing, and export all happen in your browser.

Question 4

How do I fix subtitles that are out of sync?

Accepted Answer

Use the Subtitle Time Shifter to delay or advance every cue by the same number of seconds. Upload an SRT, VTT, ASS, or SSA file, enter a positive value if subtitles appear too early or a negative value if they appear too late, then download the synced file.

Question 5

What is the difference between SRT, VTT, and ASS?

Accepted Answer

SRT is the most universal format: plain text with sequential cue numbers and HH:MM:SS,mmm timestamps. VTT is the web standard used with HTML5 video and differs from SRT mainly in its WEBVTT header and period-separated milliseconds. ASS is a richer format popular in anime fansubs that supports positioning, colors, fonts, and animations via override codes.

Question 6

Do the format converters upload my file to a server?

Accepted Answer

No. The format converters run entirely in your browser using JavaScript. Your file never leaves your device; conversions are instant and private once the page has loaded.

Question 7

What happens to ASS styling when I convert ASS to SRT?

Accepted Answer

ASS override codes such as {\b1}, {\i1}, {\pos(x,y)}, and {\c&Hffffff&} are stripped during conversion because SRT does not support positional or most styling metadata. The dialogue text is preserved, and soft line breaks (\N) are converted to real line breaks. If you need to keep styling, stay in ASS format.

Question 8

How accurate is the AI translation?

Accepted Answer

AI translation is useful for a fast first pass, especially when the subtitle timing is already correct. We still recommend reviewing names, technical terms, jokes, and culturally specific phrases before publishing. You can edit any translated cue directly in the preview before downloading.

Question 9

What languages are supported for translation?

Accepted Answer

The current UI supports 19 common languages: English, Chinese, Japanese, Korean, Spanish, French, German, Italian, Portuguese, Russian, Arabic, Hindi, Turkish, Vietnamese, Indonesian, Thai, Dutch, Polish, and Ukrainian.

Question 10

Can I create bilingual subtitles?

Accepted Answer

Yes. The subtitle translation tool includes a bilingual mode that combines original and translated text in each cue. You can choose whether the original or translation appears first, which is useful for language learning or multilingual audiences.

Question 11

Do I need an account?

Accepted Answer

No account is needed for format conversion; those browser-based tools are free to use. For AI translation and audio/video transcription, you can translate up to 10 subtitle entries or transcribe media under 1 minute without signing in. Sign in to use free credits for longer jobs, or upgrade to an active membership for unlimited usage during the membership period.

Question 12

How long does audio transcription take?

Accepted Answer

Audio transcription time depends on file length, audio quality, and current API latency. Short files usually complete quickly, while longer media can take several minutes. AI translation is typically faster, but very large subtitle files still need extra processing time.

Question 13

What audio and video formats work with transcription?

Accepted Answer

Audio transcription accepts common audio formats such as MP3, WAV, M4A, AAC, FLAC, OGG, Opus, WMA, AIFF, CAF, and M4B. Video transcription accepts common video formats such as MP4, M4V, WebM, MOV, MKV, AVI, WMV, FLV, and OGV. Files are sent to the transcription API for processing, so use the browser-only converters or editor when you need local-only handling.

Free Online Subtitle Tools for SRT, VTT, and ASS

Subtitle Translation

Audio to Subtitle

Video to Subtitle

Subtitle Editor

Subtitle Time Shifter

SRT Merger

Subtitle Splitter

SRT Fixer

SRT Cleaner

Subtitle FPS Converter

Subtitle Reading Speed Checker

Extract Hardcoded Subtitles

Subtitle Format Converters

Subtitle to Plain Text

VTT to SRT

SRT to VTT

SRT to ASS

ASS to SRT

ASS to VTT

VTT to ASS

Frequently Asked Questions