What is File Compressor ZIP?

File Compressor ZIP lets you create ZIP archives directly in your device. Select multiple files, compress them into a single ZIP file, and download it. Your files never leave your device — everything is processed locally.

The tool uses the standard DEFLATE compression algorithm via JSZip, so the resulting .zip opens in any operating system or archive utility without extra software. There's no file size cap imposed by the page itself, only what your device can hold in memory. Drag-and-drop and file picker both work, and you can drop a new batch in on top of an existing list.

How to use

1. Drag and drop files into the upload zone, or click to browse and select multiple files.
2. Review the file list showing names and sizes, and remove any files you don't want to include.
3. Click 'Create ZIP' to compress all files into a single archive and download it.

When to use

• Bundling a folder of receipts or invoices into one attachment for an email reply.
• Packaging assets for a client handoff so they download one file instead of twenty.
• Combining a few PDF reports before uploading to a portal that only accepts one file.

Result

Select 5 project documents (report.pdf, data.xlsx, notes.txt, chart.png, summary.docx) totaling 12MB, and compress them into a single 8MB ZIP file.

FAQ

How much will my files actually shrink?

It depends on file type. Plain text, code, CSV, and uncompressed images can shrink 60-90%. JPEGs, PNGs, MP4s, and most PDFs are already compressed and will only get a few percent smaller — sometimes zero.

Is there a maximum number of files or total size I can zip?

There's no fixed limit, but the page needs enough memory to hold every file plus the resulting archive. Roughly half your free RAM is a safe ceiling. For multi-gigabyte batches use a desktop archiver instead.

Can I add a password to the ZIP?

No. JSZip does not support encrypted ZIPs in any reliable cross-platform way, so this tool produces standard, unencrypted archives. For confidential files, use a desktop tool like 7-Zip with AES-256 instead.

Will folder structure be preserved?

Yes, when you add a whole folder with the Choose Folder button. The subfolder tree is kept intact inside the ZIP, so it unpacks exactly as it looked. Files you add one at a time still sit at the top level of the archive.

Do my files leave my device at any point?

No. The compression runs entirely on your device. The archive is built in memory and saved straight to your downloads. Nothing is uploaded, logged, or sent to a server.

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