Batch Subtitle Renamer for SRT, VTT & ASS
Rename up to 200 subtitle files in one pass. Add prefixes or suffixes, replace text, number episodes, or tag languages, then download a single ZIP.
Key Features
Engineered for video editors and localization teams. Helps enforce common subtitle timing rules and formatting.
Batch Subtitle Renamer for SRT, VTT & ASS Live Execution Demo
In-Memory Processing
File parsing, mutations, and time shifts for standard tools run in browser memory without sending subtitle files to our servers.
Millisecond Precision
Millisecond-accurate timecode parsing and arithmetic prevent synchronization drift across desktop and web players.
Fault-Tolerant Engine
Automatic multi-encoding detection and syntax sanitization gracefully handle malformed cues and unexpected linebreaks.
Common Use Cases
Real-world scenarios across video post-production, course transcription, and global localization.
TV Series Episodes
Rename episode subtitles to a consistent naming scheme so your media server matches them automatically.
Localization Workflow
Append language codes like .en, .zh, or .ja to subtitle files for multilingual playback.
Bulk Cleanup
Strip unwanted prefixes or text from filenames downloaded from different sources.
Numbering
Add zero-padded sequential numbers to subtitles exported without consistent ordering.
How It Works
Streamlined end-to-end processing pipeline engineered for speed and precision.
Upload & Import
Upload the subtitle files you want to rename.
Format Analysis
Pick a rename mode and configure the pattern or options.
Configuration
Watch the preview update instantly as you change the settings.
Processing
Click apply to rename every file and download the result as a ZIP.
Why Choose AllSubConverter?
Client-Side Privacy
Standard tools run in your browser so standard files are not uploaded to our servers.
Fast Local Parsing
Optimized processing engine parses and converts files directly in your browser.
Generous Batches
Up to 50 MB per file, 200 files or 1 GB total per batch.
Universal Compatibility
Runs in modern browsers across Windows, macOS, Linux, iOS, and Android.
More Subtitle Tools
Frequently Asked Questions
No. Only the filenames are changed. The subtitle text, timing, and formatting inside each file remain completely untouched.
Yes. Regex mode lets you define a pattern to match and a replacement string, giving you full control over the new filenames.
Yes, completely free with no registration, no watermarks, and no file uploads.
You can rename up to 200 files in a single batch. Everything is processed locally in your browser.
It splits each filename by your separator and replaces the last segment with the language code you choose, or appends it if the filename has only one segment.
Yes. Everything runs client-side. Your subtitle files are never sent to a server.
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