Does switching from RAR to 7z shrink the archive further?

Often, though not always — 7z's LZMA2 is among the strongest general-purpose compressors, and the two formats trade blows depending on content. Text, code, and databases favour 7z; already-compressed media such as JPEG, MP4, and MP3 barely changes size in either container.

After converting, what software opens the 7z?

Entirely free tools on every platform: 7-Zip on Windows, Keka or The Unarchiver on macOS, p7zip on Linux. That is the practical win over RAR, whose encoder is proprietary and whose extraction support often lives in separate non-free packages.

Can the converted archive be solid like my RAR was?

Both formats support solid compression — packing many files as one continuous stream for a better ratio, at the cost of slower single-file extraction. Conversion unpacks everything first anyway, so the solid setting of the output is independent of how the RAR was built.

RAR to 7Z Converter – Free & Online

Convert RAR to 7Z

Turn RAR files into 7Z in seconds — free, secure, and no signup required.

Free tier: 5 conversions/day, files up to 50 MB, ad-supported. Need more? See Pro plans →

256-bit SSL encryptionYour files are protected end-to-end

Lightning-fast conversionsProcess files in seconds, not minutes

All major archive formatsZIP, RAR, 7Z, TAR & more

No registration requiredStart instantly — 5 free conversions a day

Files auto-deleted in 1 hourGDPR-friendly: we never keep your files

Both RAR and 7Z prioritise compression, but 7Z is open and free while RAR is proprietary. Converting RAR to 7Z removes the WinRAR dependency while keeping — often improving — the compression ratio.

Convert RAR to 7Z – Free Online RAR to 7Z Converter

Why convert RAR to 7Z?

Escape RAR's proprietary format for the open 7z standard.
Match or beat RAR's compression with LZMA2.
Share archives recipients can open with free 7-Zip.

How to convert RAR to 7Z

Upload your RAR file using the area above.
7Z is preselected as the target format.
Click Start and wait for the conversion to finish.
Download your converted 7Z file.

Convert RAR to 7Z

Convert RAR to 7Z – Free Online RAR to 7Z Converter

Why convert RAR to 7Z?

How to convert RAR to 7Z

RAR to 7Z — Frequently Asked Questions