Batch File Compressor — Compress Multiple Files at Once Free
Compress multiple files in parallel in your browser. Drop a batch of images, PDFs, or archives and the tool processes them with Web Workers — free, private, no upload.
Drop multiple files here, or click to browse
Files are processed in your browser — nothing is uploaded.
What is a batch file compressor?
What is it
A batch file compressor processes many files at once instead of one at a time. filecompressor.app runs each file through a Web Worker, so the whole batch compresses in parallel while the main thread stays smooth.
Everything happens in your browser — no uploads, no sign-ups, no limits. It is ideal for shrinking a folder of images before a website launch or a set of PDFs for email.
How to compress files in a batch
How to use
Batch compression is fast and parallel:
- 1
Drop multiple files into the dropzone above, or click to browse and select them.
- 2
The batch compressor processes each file in a Web Worker in parallel, then lists every result with its new size and percentage saved.
- 3
Download files individually or grab them all as a ZIP archive.
Why use the batch compressor?
Why use it
Parallel Web Workers keep the UI smooth and finish batches fast.
100% private — files are processed in your browser and never uploaded.
Free with no sign-up, no watermarks, and no fixed file limits.
Download each file or the whole batch as a ZIP.
Handles mixed file types — images, PDFs, and archives together.
FAQ
Common questions about this compression tool.
Frequently Asked Questions
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