Archive and file guides
Learn formats, security and local processing.
How to create a ZIP file
Create ZIP files from files and folders without uploading them.
How to extract a ZIP file
Safe entry listing, file selection and result download.
How to extract RAR files
RAR v4/v5 limitations and local WebAssembly processing.
How to extract 7Z files
Solid archives, memory and entry selection.
How to convert RAR to ZIP
Conversion by extraction and archive recreation.
How to create a password-protected ZIP
AES-256, a strong password and result testing.
AES vs ZipCrypto
Why AES is the better choice for new archives.
What is ZIP64
Large files, entry counts and software compatibility.
How to split a ZIP file
Parts, manifest and completeness checks.
How to join file parts
Natural order, missing parts and SHA-256.
TAR vs ZIP
The difference between TAR containers and ZIP compression.
What is TAR.GZ
Why TAR and GZIP are commonly combined.
GZIP vs ZIP
Single-stream GZIP and multi-file ZIP.
How to test a ZIP file
Structure, CRC and full entry reading.
What is CRC
Accidental corruption detection, not cryptographic security.
How to calculate SHA-256
Chunked hashing and result comparison.
MD5 vs SHA-256
When legacy hashes are only for compatibility.
How to verify a downloaded file
Compare a checksum from a trusted source.
How to create SHA256SUMS
A list of hashes and relative folder paths.
How to compare folders
Paths, sizes, dates and exact checksums.
How to split a large file
Blob slicing, manifests and lossless joining.
How to batch rename files
Rule preview and downloading renamed files in a ZIP.
How to create a folder list
TXT, CSV, JSON and directory trees.
How to find large files
Sort metadata without reading all file contents.
How to find duplicates in an archive
Grouping by size and exact hashing of candidates.
What is a ZIP bomb
High compression ratios and extraction limits.
What is Zip Slip
Dangerous paths escaping the target directory.
Does Archiwum upload files
Local File API, workers and no upload endpoint.
Why RAR is read-only
A proprietary format and no RAR creation in the project.
Why archive conversion takes time
Full decompression and repacking.
Why a large 7Z may fail on a phone
WebAssembly memory and solid archives.
How to open archives safely
Executable extensions, links and deliberate downloads.
How ZIP encryption works
Passwords, AES and format-dependent visible metadata.
How to choose a compression level
Time, size and already-compressed files.
How to detect a file type
Magic bytes are more reliable than extensions alone.