Bundle documents, logs, spreadsheets, code or any other files into a single compressed ZIP, ready to email or upload as one attachment. Text-based files (CSV, TXT, JSON, logs, code) usually shrink by 70–90%. Photos, videos and PDFs are already compressed, so ZIP will not make them much smaller; use the dedicated image, video and PDF compressors for those.
What is ZIP File Compressor?
This tool lets you compress files to ZIP in your browser: drop any mix of documents, spreadsheets, logs, code or images and download one compressed archive. It is the easiest way to turn a pile of attachments into a single file that is quicker to email, upload or store.
Text-based files such as CSV, TXT, JSON, logs and source code usually shrink by 70–90%. Photos, videos and PDFs are already compressed, so ZIP mainly bundles them together. You choose the compression level and the archive name, and your files never leave your device.
How to use the ZIP File Compressor
- Drop any files (mix types freely).
- Choose the compression level and a file name.
- Download the ZIP.
How ZIP File Compressor works
ZIP files normally use DEFLATE compression, which combines two ideas. First it finds repeated sequences, such as the same column name on every row of a CSV, and replaces later copies with a short pointer back to the first. Then it gives common symbols shorter codes and rare ones longer codes, so frequent letters take fewer bits.
Text and data are full of repetition, which is why they compress so well. JPEG photos, MP4 videos and most PDFs have already been compressed, so they look almost random and DEFLATE cannot find much to remove. For those, use a dedicated image, video or PDF compressor first.
Maximum level searches harder for repeats and gives the smallest archive; Normal is faster; Store only bundles files without compressing. The archive is built in your browser's memory, and each file keeps its original modified date.
Key features of ZIP File Compressor
Free ZIPs, no size cap
Create archives at no cost with your free daily runs, and without a fixed file size limit. The only practical limit is your device's memory, so multi-gigabyte archives may be slow on phones.
Standard DEFLATE archives
Archives use standard DEFLATE compression and open with the built-in tools in Windows, macOS, Linux, Android and iOS. Each file keeps its name and modified date, and duplicate names are numbered automatically.
Fast, all on your device
Files are compressed on your device as soon as you click Create ZIP. Large folders are never sent to a server, and the result line shows the total size before and after, with the percentage saved.
Any device, any file type
Drop files from a desktop, choose them from a phone's file picker or a tablet's Files app. It works in current Chrome, Edge, Safari and Firefox on every major system.
Accessible archive settings
The level menu and name field are labelled and keyboard operable. Screen readers announce progress and the final archive size, and the page supports zoom, small screens and dark mode.
Files never leave your device
Everything is zipped inside your browser, so contracts, code and personal files are not sent to any server. You can check the network tab and see that nothing is sent.
What makes EZ Compress's ZIP File Compressor different
Honest about what shrinks
Many sites imply ZIP shrinks everything. The result line shows the real before and after sizes, and this page points photos, videos and PDFs to the right dedicated compressors instead of pretending.
Three compression levels
Choose Maximum for the smallest archive, Normal for extra speed with very large text files, or Store only to bundle already-compressed photos and videos quickly without wasting time on compression they do not need.
Name your archive
Type the archive name before you download, such as invoices-march or project-handover, so the recipient knows what is inside without opening it, and your own downloads folder stays tidy too.
Why use ZIP File Compressor?
Sending twenty attachments one by one is tedious, and many forms accept only one file. A zip file compressor bundles everything into a single upload, and for text-heavy files it cuts the size dramatically. It works as a general file compressor when you need to zip files online without installing an archiver on a work or school computer.
Use it to create ZIP file bundles of logs for a support ticket, a dataset for a colleague, or coursework for a submission portal. To compress a folder, open it, select all the files inside and drop them in together.
Who can use ZIP File Compressor?
Developers
Bundle log files, configuration and source snippets into one small archive to attach to a bug report or support ticket.
Data analysts
Compress files to ZIP when CSV and JSON exports are too large, cutting them by 70–90% so they fit email limits and reach colleagues quickly.
Students
Package coursework files, code and written reports into one ZIP for submission portals that accept only a single upload per assignment.
Office workers
Send a set of invoices, letters and spreadsheets as one tidy attachment, on a work computer where you cannot install software.
Researchers
Archive experiment outputs, text data and lab notes into a single compressed file for sharing with collaborators or for long-term storage.
Settings explained
| Setting | What it does |
|---|---|
| Compression level | Light keeps the most detail, Recommended balances size and quality, Strong gives the smallest file. |
| ZIP file name | Name of the downloaded file. |