Video & Subtitle Tools
LumaTool Video Tools provides subtitle utilities for creators, including YouTube subtitle workflows, SRT/VTT conversion, subtitle cleanup, translation preview, and caption editing helpers.
What you can do
LumaTool video subtitle tools are designed for creators who need a practical browser workflow around captions, YouTube subtitles, SRT and VTT files, transcript cleanup, translation preparation, and caption editing. Use this collection to normalize subtitle formats, clean noisy auto-captions, shift timing, count subtitle words, prepare translation drafts, preview speech, or move between YouTube-related helpers and local subtitle files. The goal is not to hide the workflow behind a single vague converter; each tool keeps one subtitle task clear so you can inspect the result before publishing or sending it to another editor. Many subtitle operations run locally in the browser, which helps when you are working with draft captions, course material, localization notes, or creator assets that should not be uploaded unnecessarily. Start from the file or YouTube reference you already have, choose the matching tool, and then continue into cleanup, conversion, translation review, or publishing prep.
Popular tools
SRT Subtitle Formatter
Repair SRT numbering, blank lines, timestamps, and cue order locally in your browser.
Use Now SSRT to VTT Converter
Convert SRT subtitle files to WebVTT locally in your browser.
Use Now SSubtitle Cleaner
Clean subtitle text, remove tags, normalize whitespace, and keep cue timing.
Use Now SSubtitle Line Breaker
Optimize subtitle line length for one-line or two-line player-friendly display.
Use Now SSubtitle Merger
Merge short subtitle fragments into natural cues while preserving earliest start and latest end times.
Use Now SSubtitle Overlap Checker
Find overlapping, reversed, too short, too long, and tightly spaced subtitle cues.
Use Now SSubtitle Splitter
Split long subtitle cues by length, words, punctuation, and duration with automatic timing.
Use Now SSubtitle Time Shifter
Shift SRT and VTT subtitle timings forward or backward locally.
Use Now SSubtitle Timing Fixer
Automatically repair subtitle overlaps, minimum gaps, cue duration, and timing order.
Use Now SSubtitle to Dubbing Script
Turn SRT or VTT subtitles into a clean narration script for TTS and dubbing workflows.
Use Now SSubtitle Translation QA Checker
Compare source and translated subtitles for cue count, timing, empty lines, repeated text, and text that still looks like the source language.
Use Now SSubtitle Translator
Parse SRT/VTT blocks, prepare translation JSON, edit translated text, and export subtitle files.
Use Now SSubtitle Word Counter
Count subtitle blocks, words, characters, duration, reading speed, and longest lines.
Use Now TText to Speech Preview
Preview local browser speech voices for short text and subtitle lines.
Use Now VVTT to SRT Converter
Convert WebVTT captions to SRT subtitle format locally.
Use Now YYouTube Timestamp Generator
Create YouTube links that start at an exact hour, minute, and second.
Use Now YYouTube Transcript Helper
Extract a YouTube video ID and generate watch, embed, thumbnail, and timedtext reference links.
Use Now YYouTube Video ID Extractor
Extract video IDs from watch, youtu.be, shorts, embed, and live YouTube URLs.
Use NowFAQ
What subtitle formats are supported?
The video subtitle collection includes SRT and VTT conversion, cleanup, timing helpers, translation preparation, and related YouTube subtitle workflows.
Can I clean YouTube auto-captions?
Yes. Use the subtitle cleaner and related helpers to remove noise, prepare transcript text, and review captions before translation or publishing.
Are subtitle files uploaded?
Many subtitle tools process text and files locally in the browser. Tool pages call out network-backed behavior when it applies.
Does LumaTool automatically translate subtitles?
The subtitle translator prepares editable translation files and previews. Automatic translation depends on any external workflow you choose to connect.