Free Online Subtitle Editor

Simple and easy-to-use online subtitle editing tool, supports multiple formats

Export: SRT, ASS, PDF, TXTAI TranslationTime Sync Editor100% Free Online
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Everything You Need to Edit & Proofread Subtitles Online

Millisecond Timecode Synchronization

Adjust start and end timestamps, split long lines, or merge short cues with real-time video playback preview.

Bilingual Side-by-Side Proofreading

View and edit original and translated subtitle tracks side by side, or export dual-language SRT and ASS files.

Built-In AI Subtitle Translation

Translate entire subtitle files into 40+ languages directly inside the editor while keeping every timestamp intact.

Multi-Format Import & Export

Import and export standard SRT, ASS, WebVTT, plain TXT transcripts, or formatted PDF documents in one click.

How to Edit Subtitles Online in 3 Steps

1. Open or Upload Subtitle File

Import an existing SRT, VTT, or ASS file from your computer, or open a subtitle track directly from our AI extractor.

2. Edit Text, Timing & Translations

Use search-and-replace, fine-tune start/end timecodes, and switch between single-language and bilingual views.

3. Export Clean Subtitles

Download your polished captions immediately in SRT, ASS, TXT, or PDF format with no watermark.

Online Subtitle Editor FAQ

Which subtitle formats can I edit and export?

You can upload and edit SRT, WebVTT, and ASS subtitle files, and export your finished captions to SRT, ASS, plain text (TXT), or PDF.

What if I only have a video file without a subtitle file?

If you only have an MP4, MKV, or MOV video, use our AI Subtitle Extractor first to extract hardcoded captions (OCR) or transcribe audio (Speech-to-Text), then click 'Open in Editor' to refine the lines.

Can I create bilingual subtitles in the online editor?

Yes. Use the built-in AI translation panel to generate a secondary language track, preview both languages side by side, and export a merged bilingual SRT or ASS file.