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Batch Subtitle File Renamer

Fast. Private. Perfect.

Upload multiple subtitle files and rename them all in one pass. Add prefixes or suffixes, replace text, number them sequentially, or tag them with language codes, then download the renamed files as a ZIP.

Private & Secure
Blazing Fast
Free & Unlimited
100% LocalNo UploadSecureInstant

How It Works

1

Upload the subtitle files you want to rename.

2

Pick a rename mode and configure the pattern or options.

3

Watch the preview update instantly as you change the settings.

4

Click apply to rename every file and download the result as a ZIP.

Why Choose AllSubConverter?

Your Privacy Matters

Everything runs in your browser. Your files are never uploaded.

Lightning Fast

Optimized processing engine converts files in seconds.

Truly Unlimited

No file size limits. No daily limits. Completely free.

Works Everywhere

Works on Windows, Mac, Linux, iOS, Android - any modern browser.

Key Features

Six rename modes: prefix, suffix, find-and-replace, regex, sequential numbering, and language codes
Live preview shows the original and new filenames side by side before you apply anything
Case-sensitive and case-insensitive matching for precise control
Sequential numbering with configurable start value and zero-padding
Language code tagging that replaces or appends a locale code to each filename
Rename hundreds of files at once and download them as a single ZIP archive
File contents are never modified - only the filenames change
100% browser-based - no file uploads, complete privacy

Common Use Cases

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.

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.

Ready to rename your files?

Upload multiple subtitle files and rename them all in one pass. Add prefixes or suffixes, replace text, number them sequentially, or tag them with language codes, then download the renamed files as a ZIP.