Free Online Archive Converter

ChangeThisFile supports ZIP, RAR, 7Z, TAR, TAR.GZ (tgz), TAR.BZ2, and TAR.XZ archive formats. You can convert between any combination of these formats.

Archive conversions extract the source archive and re-compress its contents into the target format using 7-Zip on the server. Your files are encrypted in transit and auto-deleted immediately after conversion.

Yes. Go to the RAR to ZIP converter page and upload your .rar file. The converter extracts the RAR archive contents and re-packages them as a standard ZIP file. This is useful when you need to share files with someone who does not have a RAR extractor.

All three are TAR archives with different compression algorithms. TAR.GZ (gzip) offers fast compression and decompression with good ratios. TAR.BZ2 (bzip2) provides better compression but is slower. TAR.XZ (xz/LZMA2) offers the best compression ratios but is the slowest. For most uses, TAR.GZ is the best default choice.

Archive conversions have a 25MB file size limit (free tier; 500MB on Pro). This applies to the compressed archive file, not the uncompressed contents. Most archives under 50MB extract and re-compress without issues.

Yes. The converter preserves the complete directory structure, file names, and file contents from the source archive. Only the compression format changes — the internal structure remains identical.

Password-protected archive support depends on the format. Standard ZIP encryption and RAR passwords are supported by 7-Zip. The converted output archive will not be password-protected unless you re-encrypt it with your own tools.

7Z is an open-source archive format from the 7-Zip project that supports multiple compression algorithms including LZMA2, which typically achieves 30-70% better compression than ZIP. It supports encryption, multi-volume archives, and file headers compression.

Common reasons include compatibility (not everyone has 7-Zip or WinRAR), platform requirements (Linux often uses TAR.GZ while Windows uses ZIP), and size optimization (7Z and TAR.XZ compress better than ZIP). Converting also strips passwords if you no longer need encryption.