All subtitle tools

25 free subtitle utilities for SRT and WebVTT files. Every tool runs entirely in your browser, converts locally and never uploads your subtitle text.

Conversion

Convert between subtitle formats and structured data. Text and timings are preserved.

SRT to VTT Converter

SubRip → WebVTT with header.

Conversion

VTT to SRT Converter

WebVTT → SubRip with numbers.

Conversion

Format Converter

SRT ↔ VTT in either direction.

Conversion

SRT to Plain Text

Strip timestamps, keep dialogue.

Text

VTT to Plain Text

Extract dialogue from VTT.

Text

Subtitle to JSON

Export cues as structured JSON.

Conversion

JSON to SRT

Rebuild an SRT from JSON data.

Conversion

Timing

Shift, adjust and analyse subtitle timings without touching dialogue.

SRT Time Shifter

Shift all cues forward or backward by seconds.

Timing

Millisecond Shifter

Adjust cues with millisecond precision.

Timing

Duration Report

Total runtime, average and extremes.

Timing

Validation

Check subtitle files for errors before you publish them.

SRT Validator

Errors, overlaps and empty cues.

Validation

VTT Validator

Structural checks for WebVTT files.

Validation

Line Length Checker

Find cues exceeding reading limits.

Validation

Format Detector

Identify format with confidence.

Validation

Text utilities

Count, convert and search subtitle dialogue.

Word Counter

Total dialogue words for reading speed.

Text

Line Counter

Count cue blocks and dialogue lines.

Text

Case Converter

UPPER, lower, Title or Sentence case.

Text

Search & Replace

Find and swap text across cues.

Text

Encoding Cleaner

Remove BOM and zero-width characters.

Text

Structure

Merge, split, renumber and clean subtitle file structure.

Subtitle Merger

Combine two files chronologically.

Structure

Subtitle Splitter

Split one file into equal parts.

Structure

Cue Renumbering

Sequential 1..N numbering.

Structure

Remove Empty Cues

Delete whitespace-only cues.

Structure

Remove HTML Tags

Strip HTML and ASS tags.

Structure

Subtitle Preview

Visual list of cues and timings.

Structure

Format Cleaner

Normalize spacing and endings.

Structure