ZIP to 7Z Converter
Convert ZIP to 7Z online for free. Fast, secure, and high-quality conversion with no sign-up or software required.
Maximum file size is 1GB
How it works
Three steps to your converted file
Everything happens in your browser tab - upload, pick a format, download. The heavy lifting runs on our servers.
Upload your file
Drag and drop, click to browse, or paste a URL. Batches take up to 20 files at once - 230+ input formats across video, audio, image, document, and archive types.
Choose an output format
Pick from over a hundred output formats. Filter by category or search by name - every option is open to everyone, no account needed.
Convert & download
Hit Convert and grab your download link moments later. Originals are erased when the job completes; results are cleared within about an hour.
What is a ZIP file?
The ZIP format is an archive file format capable of lossless data compression, originally created by Phil Katz of PKWARE. It utilizes a Central Directory structure to catalog files and supports various compression algorithms, most notably DEFLATE (RFC 1951). The format is standardized under ISO/IEC 21320-1:2015 as a document container file and serves as the base structure for modern file types like .docx and .jar.
How to open a ZIP file
The ZIP format enjoys universal native support across all major operating systems, including Windows (File Explorer), macOS (Archive Utility), and Linux. No third-party software is strictly required for basic extraction, though power users often employ tools like 7-Zip or WinRAR to access advanced features like AES-256 encryption or multi-volume spanning.
ZIP Technical Info
- Full Name
- ZIP Archive
- Developed By
- Phil Katz (PKWARE)
- Initial Release
- 1989
- MIME Type
- application/zip
What is a 7z file?
The 7z format is a compressed archive container created by Igor Pavlov in 1999, characterized by an open architecture and high compression ratios utilizing the LZMA and LZMA2 algorithms. It supports file sizes up to 16 exbibytes (2^64 bytes), Unicode file names, and strong AES-256 encryption, with solid compression capabilities to enhance efficiency for similar file sets. Distributed under the GNU LGPL, the format's modular design accommodates various pre-processing filters and encryption methods, establishing it as a primary standard for high-efficiency data archival.
How to open a 7z file
While Windows 11 builds utilizing the libarchive project offer native support, earlier Windows versions require the official open-source 7-Zip utility or alternatives like WinRAR and PeaZip for extraction. macOS users typically rely on third-party software such as The Unarchiver or Keka, whereas Linux distributions handle 7z archives via the p7zip package accessed through the command line or GUI managers like File Roller.
7z Technical Info
- Full Name
- 7z Archive Format
- Developed By
- Igor Pavlov
- Initial Release
- 1999
- MIME Type
- application/x-7z-compressed
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The fastest way to convert any file
Purpose-built for speed, privacy, and breadth of format support.
Convert ZIP to 7Z in seconds
Every ZIP to 7Z conversion runs on our servers, so your device stays fast and the output quality stays intact.
Fast, cloud-powered
No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
Secure & private
Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
Free - no account needed
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Developer API
Convert ZIP to 7Z via API
Automate ZIP to 7Z conversions in three steps: create a job, upload your file, then poll for the result.
# 1. Create job
curl -X POST https://api.runconvert.com/v3/jobs \
-H "Authorization: Bearer YOUR_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"tag": "zip-to-7z",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "7z"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.zip
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$JOB_ID?include=tasks \
-H "Authorization: Bearer YOUR_API_KEY"Replace YOUR_API_KEY with your RunConvert API key. Get your free API key at runconvert.com/api.