Bundle any set of files into a single ZIP archive — pick the compression level, name the archive, and download it without uploading a byte.
Any file type
Email clients, ticket systems and upload forms all behave better with a single file. Zipping is the universal answer — every operating system opens ZIP without extra software.
Text, CSV, JSON, SVG and source code compress dramatically — often to a fifth of their size at level 6, slightly smaller at level 9. Already-compressed formats (JPEG, PNG, MP3, MP4, PDF, and other ZIPs) gain almost nothing, so level 0 packs them instantly without wasting CPU. When a batch mixes both, level 6 is the sensible compromise.
To look inside an existing archive, use the online unzip tool. To shrink images before zipping them, the image compressor will do far more for the final size than any compression level.
No. Compression runs in your browser and the finished ZIP is handed straight to your downloads folder.
Level 6 is a good default. Use 9 for text-heavy content where every byte counts, and 0 (store) for files that are already compressed — JPEGs, MP3s, MP4s and PDFs barely shrink and level 0 is far faster.
Files keep their names but not their folder structure; browsers hand a flat list to web pages. Rename files beforehand if the hierarchy matters.
No fixed limit. Everything is compressed in memory, so extremely large batches are limited only by your device.
No. The archive uses standard unencrypted ZIP compression and has no password option. Use an encryption-capable desktop archiver when the archive itself must enforce access control.