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Convert JAR to 7Z

Convert JAR archives to 7Z in one step: the archive is extracted and re-packed inside your browser. 7Z gives the smallest file size and strong AES-256 encryption.

  • No upload — 100% private
  • Fast, lossless when possible
  • Free & unlimited
  • Works on iPhone & Android
    Compression

    How to convert JAR to 7Z

    1. 1

      Tap Choose archive and pick your JAR file.

    2. 2

      Check that 7Z is selected and choose the compression level.

    3. 3

      Press Convert archive. Enter the password if the original is protected.

    4. 4

      The 7Z downloads automatically.

    JAR vs 7Z

    JAR7Z
    Full nameJava Archive7-Zip archive
    Can create hereExtract onlyYes
    Developed bySun MicrosystemsIgor Pavlov
    Introduced19961999
    Opens on iPhone✕ Needs an app (or this site)✕ Needs an app (or this site)
    Opens on Android✕ Needs an app (or this site)✕ Needs an app (or this site)
    Opens on Windows◐ Newer versions only◐ Newer versions only
    Opens on Mac◐ Newer versions only✕ Needs an app (or this site)

    JAR: JAR is a ZIP-based archive holding Java classes and resources. Open it to inspect or extract its contents.

    7Z: 7Z is the 7-Zip archive format. Its LZMA2 compression usually makes files 10–40% smaller than ZIP, and it supports strong AES-256 encryption including encrypted file names.

    Frequently asked questions

    Will my files change when converting JAR to 7Z?
    No. Archive formats are lossless, so every file is restored bit for bit and packed again.
    My JAR is password-protected — can I convert it?
    Yes. Enter the password when asked. You can also set a new password on the output (ZIP and 7Z).
    Is there a size limit?
    No fixed limit. It depends on your device's memory: several GB on computers, a few hundred MB on phones.
    Are my files uploaded?
    No. Everything runs in your browser with 7-Zip compiled to WebAssembly.

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    Convert JAR to other formats

    JAR to ZIPJAR to TARJAR to TAR.GZJAR to TAR.BZ2JAR to TAR.XZ

    Convert other archives to 7Z

    ZIP to 7ZRAR to 7ZTAR to 7ZTAR.GZ to 7ZTAR.BZ2 to 7ZTAR.XZ to 7ZGZ to 7ZBZ2 to 7ZXZ to 7ZISO to 7ZCAB to 7ZLZH to 7Z

    Helpful tools

    Unzip / ExtractOpen ZIP, RAR, 7Z, TAR.GZ, ISO, CAB and 30+ archive types online. Preview the files, save…Create ZIPZip files and whole folders online, free. Choose compression level, add AES-256 password…Compress Files (7Z)Shrink files and folders with 7-Zip Ultra (LZMA2) compression — often 30–70% smaller for…