Convert ZIP archives to the highly efficient 7Z compression format without uploading anything to a server.
Drag & drop a .zip file here, or browse
Max size: 500 MB (Desktop)
Ultimate Data Privacy
No servers, no cloud storage, no logs. Your files are processed entirely within a browser Web Worker sandbox.
High Compression Ratio
7Z archives powered by LZMA compression drastically reduce file sizes compared to standard ZIP archives.
Unicode & Folder Fidelity
Preserves complete directory hierarchies and special character filenames exactly as originally archived.
Zero Memory Leaks
Automatically revokes memory allocations, unmounts virtual files, and terminates workers upon task completion.
System Specifications:
Compatible with Chrome, Edge, Firefox, and Safari on desktop and mobile devices.
ConvertAllNow offers a secure, zero-upload online utility specifically architected to transform ZIP archives into highly compressed 7Z archives right inside your web browser. Utilizing modern WebAssembly (WASM) technology, this converter bypasses cloud servers entirely, offering unequaled privacy, immediate processing speed, and zero external transfer latency.
While ZIP is widely recognized, the 7Z archive format employs sophisticated LZMA and LZMA2 algorithms that deliver significantly higher compression ratios. Converting large file archives from standard ZIP to 7Z saves important local disk storage and reduces bandwidth consumption when sharing files online, all while perfectly preserving internal folder hierarchies and multilingual Unicode file naming conventions.
Traditional conversion tools force you to upload personal documents or company archives to third-party servers, posing serious data confidentiality risks. Our converter runs a compiled 7-Zip engine inside an isolated background Web Worker on your device. Your data never transmits across the network, ensuring complete zero-knowledge privacy and instant memory disposal upon completion.
Everything you need to know about our browser-based ZIP to 7Z file converter.
Yes, ConvertAllNow provides this archive converter completely free of charge. There are no registration requirements, no paywalls, and no daily conversion quotas.
No! Your files never leave your device. Conversion happens entirely inside your web browser using WebAssembly and Web Workers. No file contents, filenames, or data packets are transmitted across the internet or stored on external backend servers.
On desktop devices, you can process ZIP archives up to 500 MB in size. On mobile devices and tablets, the maximum file limit is 100 MB to ensure smooth processing without exhausting device random access memory (RAM) or causing browser out-of-memory errors.
The 7Z archive format utilizes advanced LZMA and LZMA2 compression algorithms, offering significantly higher compression ratios than traditional ZIP format. This results in much smaller file sizes while preserving original folder structures and Unicode filenames.
Absolutely. The exported .7z files are 100% compatible with all standard archiving utilities, including desktop 7-Zip, WinRAR, WinZip, Keka, Peazip, as well as built-in archive extractors in modern Windows, macOS, and Linux operating systems.
هل انتهيت من الوسائط الخاصة بك؟ تحقق من أدواتنا المخصصة الأخرى لتحميل وتحويل وضغط الملفات.