JAR to ZIP Converter
Convert JAR to ZIP 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 JAR file?
The JAR (Java Archive) file format is a platform-independent package file format based on the ZIP standard, originally developed by Sun Microsystems (now Oracle Corporation) to aggregate multiple Java class files, associated metadata, and resources into a single distribution unit. It utilizes the DEFLATE compression algorithm to reduce file size and necessitates a manifest file, typically located at META-INF/MANIFEST.MF, which specifies the application entry point (Main-Class attribute) and classpath dependencies. The format is integral to the Java Platform, allowing the Java Runtime Environment (JRE) to deploy applications and libraries efficiently by reducing HTTP requests during network transfer.
How to open a JAR file
To execute a JAR file as a standalone application, the host system requires the installation of a Java Runtime Environment (JRE) or Java Development Kit (JDK); users typically run the file via the command line interface using java -jar or through configured OS file associations. For static inspection or extraction of the archive's contents without execution, users can utilize standard file compression utilities such as 7-Zip, WinRAR, or the unzip command on Unix-based systems, as the JAR format complies with standard ZIP file specifications.
JAR Technical Info
- Full Name
- Java Archive
- Developed By
- Sun Microsystems (Oracle Corporation)
- Initial Release
- 1997
- MIME Type
- application/java-archive
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
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Purpose-built for speed, privacy, and breadth of format support.
Convert JAR to ZIP in seconds
Every JAR to ZIP conversion runs on our servers, so your device stays fast and the output quality stays intact.
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No queue, no waiting. Files are processed on high-performance servers and returned in seconds, even for large files.
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Encrypted in transit and never shared with anyone. Uploads are erased the moment your job completes, and results shortly after.
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Developer API
Convert JAR to ZIP via API
Automate JAR to ZIP 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": "jar-to-zip",
"tasks": {
"upload-file": {
"operation": "import/upload"
},
"convert": {
"operation": "convert",
"input": "upload-file",
"output_format": "zip"
},
"export-result": {
"operation": "export/url",
"input": "convert"
}
}
}'
# 2. Upload your file (use upload_url from the response)
curl -X PUT "$UPLOAD_URL" --upload-file input.jar
# 3. Poll for result
curl https://api.runconvert.com/v3/jobs/$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.