Free Online Subtitle Tools

Convert, sync, fix, and edit .srt, .ass, .vtt subtitle files — instantly in your browser. No signup, no limits.

Everything runs in your browser — no account, no upload limits, no waiting. Pick a tool below to get started.

Converters

Convert to SRT

ASS, SSA, VTT, SUB, SMI, MPL2 → SRT. Batch supported.

Convert to WebVTT

SRT, ASS, SSA → WebVTT (.vtt). Batch supported.

Convert to Plain Text

Strip timestamps and indices. Export dialog only.

Convert to PDF

Turn SRT subtitles into a formatted PDF document.

Convert to UTF-8

Re-encode subtitle files to UTF-8. Fix garbled text.

Chinese Pinyin

Add pinyin romanization above Chinese subtitle text.

Syncing

Subtitle Sync Shifter

Shift all timestamps forward or backward. Batch supported.

Partial Sync Shifter

Apply different offsets to different parts of the file.

Fixing

SRT Cleaner

Remove SDH tags, HTML formatting, ads, and watermarks.

Merge Subtitles

Combine two subtitle files by interleaving or stacking.

Styling

Change Subtitle Color

Change text color for ASS/SSA and SRT subtitle files.

Change Subtitle Position

Move subtitles to top, middle, or bottom of screen.