Free subtitle and video tools
Free browser-based tools for subtitle conversion, transcript extraction, SRT merging, caption timing repair, and video bitrate calculation. No signup or file upload required.
- Free SRT to VTT subtitle converter — Convert subtitle files between SRT, WebVTT, and plain text. Validate timestamps, overlaps, empty cues, and malformed caption blocks before downloading the result.
- Free subtitle time shifter and sync tool — Advance or delay every subtitle cue by a precise offset, or rescale the complete timeline to correct common frame-rate mismatches. Supports SRT and WebVTT files.
- Free video bitrate and file-size calculator — Calculate the average video bitrate required to reach a target file size after accounting for video duration, audio bitrate, and container overhead.
- Free SRT to ASS subtitle converter — Convert SubRip subtitles into a conventional Advanced SubStation Alpha v4.00+ file with FFmpeg-compatible sections, styles, Dialogue events, and centisecond timestamps.
- Free SRT to JSON subtitle converter — Convert every SRT cue into a predictable JSON object containing its index, integer millisecond values, readable SRT timecodes, and caption text.
- Free online SRT subtitle merger — Combine two SRT files into one subtitle track, optionally offset the second file, sort all valid cues by start time, preserve overlaps, and renumber the output.
- Free SRT to TXT subtitle converter — Extract readable dialogue from SRT or WebVTT files by removing cue numbers, timestamps, HTML formatting, and ASS-style override tags while preserving UTF-8 text.
- Free ASS and SSA to SRT converter — Read ASS or SSA Events fields, preserve compatible dialogue timing and line breaks, remove unsupported appearance instructions, and download a portable numbered SRT file.