SRT/VTT Format Converter
Tool #1Convert between SRT and VTT subtitle formats. Time separators are automatically adjusted (comma <-> period).
Drop SRT/VTT file here or click to browse
Supported: .srt, .vtt
Output
About SRT/VTT Format Conversion
SRT (SubRip) and VTT (WebVTT) are the two most popular subtitle file formats. While both serve the same purpose of displaying timed text with video, they have key differences in syntax and compatibility. SRT files use commas for time separators (HH:MM:SS,mmm) and work universally across most video players. VTT files use periods (HH:MM:SS.mmm) and are the web standard, designed specifically for HTML5 video elements. This online converter tool allows you to seamlessly switch between these formats without any quality loss, as the conversion is done entirely in your browser with no server uploads.
The conversion process automatically handles the time separator difference, preserves all subtitle content including special formatting, and maintains perfect timing synchronization. Whether you need VTT files for web video or SRT files for video editing software, this free tool has you covered. Simply upload your file or paste the content directly, choose your target format, and download the converted result instantly.
Time Shifter
Tool #2Adjust subtitle timing by adding or subtracting milliseconds. Perfect for fixing sync issues between video and subtitles. Automatically handles time carry/borrow.
Drop SRT/VTT file here or click to browse
Supported: .srt, .vtt
Positive = delay, Negative = advance
Output
About Time Shifting Subtitles
Subtitle synchronization issues are common when video has been re-encoded, edited, or when using subtitles from different sources. This time shifter tool allows you to adjust all timestamps in your subtitle file by a specified number of milliseconds. Simply enter a positive value to delay subtitles (make them appear later) or a negative value to advance them (make them appear earlier). The tool automatically handles complex time calculations including hour, minute, second, and millisecond carry and borrow operations, ensuring perfect synchronization without any manual adjustments.
Unlike other online tools that require you to upload your files to servers, this tool works entirely in your browser. Your subtitle files never leave your computer, ensuring maximum privacy and security. The adjustment is applied uniformly to all subtitle blocks, maintaining consistent spacing between subtitles. The preview feature lets you verify the changes before downloading, and the tool supports batch operations on files with hundreds or even thousands of subtitle entries.
Subtitle Cleaner
Tool #3Remove ads, URLs, and HTML tags from subtitle files. Cleans downloaded subtitles that often contain spam links or unwanted formatting.
Drop SRT/VTT file here or click to browse
Supported: .srt, .vtt
Output
About Subtitle Cleaning
Free subtitles downloaded from the internet often contain unwanted advertisements, spam URLs, or excessive HTML formatting tags. This subtitle cleaner tool removes these elements while preserving the actual subtitle content and timing information. The cleaning process automatically detects and removes common URL patterns (www.xxx.com, http://, https://, etc.) as well as HTML tags like <b>, <i>, <font>, and others that may interfere with proper subtitle display. The result is clean, pure text subtitles that work perfectly across all video players and platforms.
Unlike manual cleaning which can be time-consuming and error-prone, this automated tool processes your entire subtitle file in seconds. It maintains the original structure including subtitle indexes, timestamps, and multi-line text blocks. The tool supports both SRT and VTT formats and works entirely client-side, meaning your files never leave your browser. This ensures your privacy is protected while giving you complete control over the cleaning process with customizable options.
Bilingual Merger
Tool #4Merge two SRT/VTT subtitle files into one bilingual subtitle. Perfect for dual-language videos.
Drop file or click
Drop file or click
By Index: Match subtitles by their number order
By Timestamp: Match subtitles by time (Tolerance: ms)
Bilingual Output
About Bilingual Subtitle Merging
Creating bilingual or dual-language subtitles is essential for reaching international audiences. This merger tool combines two subtitle files into one, displaying both languages simultaneously. This is perfect for language learning, accessibility, or serving multilingual viewers. The tool supports two matching strategies: index-based matching which pairs subtitles by their sequence number, and timestamp-based matching which pairs subtitles by their timing (useful when the two files have slightly different structures).
The merging process is intelligent and handles cases where the two subtitle files have different numbers of entries. You can customize the output format (SRT or VTT) and the separator between languages (newline, pipe symbol, etc.). The result maintains proper subtitle sequencing and timing, ensuring professional-quality bilingual subtitles. Like all our tools, the processing happens entirely in your browser with no data ever being sent to servers.