Subtitle File Tools
Generate, merge, split, and clean SRT subtitle files locally. These tools fill the file assembly gap around the existing subtitle editor, caption burn-in, and chapter tools.
Generate
Turn untimed text into SRT drafts
Assemble
Merge and split subtitle files
Clean
Sort, renumber, and normalize SRT
Starting with plain text?
Use SRT from Text to create an estimated subtitle draft, then refine timing in the subtitle editor.
Create subtitle files
Turn rough text into a usable SRT draft.
Assemble subtitle files
Combine or divide caption files without leaving the browser.
Subtitle Tools
Edit timing, reflow long lines, shift captions, or burn the finished subtitle file into a video.
SRT Editor Online
Paste or upload an SRT file, edit cue text and timing, then download a clean SRT.
VTT Editor Online
Edit WebVTT captions, check timing issues, and export a clean .vtt file.
SRT to VTT Converter
Convert SRT subtitles to WebVTT locally in your browser.
VTT to SRT Converter
Convert WebVTT captions to SRT format without uploading your file.
Subtitle Length Checker
Find captions with long lines, long durations, overlaps, and timing issues.
Review subtitle files
Compare versions and catch readability, sensitive-text, and publishing QA issues.
SRT Diff Tool
Compare two SRT or VTT files locally for cue count changes, timing drift, changed text, added cues, and removed cues.
Caption Reading Speed Checker
Check SRT or VTT captions for characters per second, words per minute, duration, and long-line readability issues in the browser.
Caption Profanity Checker
Review SRT or VTT captions for a small built-in English profanity list plus your own custom terms, all locally in the browser.
Caption PII Checker
Scan SRT or VTT captions locally for likely emails, URLs, IPv4 addresses, phone numbers, card-like numbers, and token-like strings.
After file assembly
Edit timing, reflow long lines, shift captions, or burn the finished subtitle file into a video.