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what are br files

PeaZip is a free cross-platform file archiver utility that provides an unified portable GUI for many Open Source technologies like 7-Zip, Brotli, FreeArc, PAQ, UPX, Zstandard... free alternative to WinRar, WinZip and similar proprietary software.
- Create 7Z, ARC, Brotli BR, BZ2, GZ, *PAQ, PEA, QUAD/BALZ, TAR, UPX, WIM, XZ, ZIP, Zstandard files
- Open and extract ACE, ARJ, CAB, DMG, ISO, LHA, RAR, UDF, ZIPX files and more, over 200 archive types supported
Features of PeaZip includes: archives opener and extractor, manage Google Brotli format, batch creation and extraction of multiple archives at once, convert files, create self-extracting archives, split & join files, strong encryption with two factor authentication, encrypted password manager, secure delete, find duplicate files, calculate hash & checksum, export job definition as script.

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What is BR format, Brotli compressed files


BR extension

BR extension designates a pure data compression format not providing file archival nor encryption features.
Brotli compression algorithm was developed by Google continuing and superseding previous Zopfli project (which was meant for compatibility with standard zlib GZip /  Deflate specifications) in order to provide a more flexible compression algorithm, capable both of high speed at low compression settings, and improved (better than Deflate) compression ratio at higher compression settings. Extraction of Brotli-compressed files is also extremely fast.

Brotli-compressed files are usually identified by .br extension, and can contain a single input file; to overcome this by-design limitation PeaZip automatically cascades Brotli compression with TAR archiving if multiple files or folders are sent as input for BR file creation, resulting in a .tar.br archive; learn more about files with double extension.
In this two step process, input files are consolideted in a single TAR archive (very fast, as no compression is involved), which is then compresed by Brotly in the second step. On a related note, this procedure improves compression ratio over compressing each input file separately, read more about this topic on solid compression page.

what is a br file

When is Brotli compression recommended

Google Brotli compression should be considered as viable alternative to Zopfli and Deflate (Gzip, ZIP) when maximum compression / extraction speed and efficiency is desired.
Both Brotli and its competitor Facebook's Zstandard outperforms classic zlib / Deflate in fast, near real time data compression and decompression.
 br files features
Read more about .br file type on Google Brotli official repositoryBrotli online, and Brotli algorithmBrotli compression wiki entry on Wikipedia.

PeaZip features creation and extraction of BR files, can read (open, test and extract) and write (compress to) BR file type relying on official Google's Brotli implementations for Windows and Linux systems.

what is brotli compression algorithm

br format specifications


  



  

.BR

 Authors Jyrki Alakuijala, Zoltán Szabadka (Google), 2013
limited to 1 single file as input

SPEED brotli fast compression

Brotli excels in fast compression and clearly outperforms classic Deflate providing comparable compression levels.






COMPRESSION RATIO Brotli algorithm performances

Brotli algorithm provides flexible compression, with good compression ratio (improved over Deflate) at higher compression settings.
ADVANCED OPTIONS brotli features
BR format is meant only for data streams or single-file compression, lacks archiving and encryption features by design.





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FAQ > Archive file types > What are Google Brotli BR compressed files

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