Compress. Encrypt. Keep it private.
A native Windows file archiver with an adaptive compression engine, AES-256 encryption and cross-archive deduplication. Everything runs on your machine.
Built for speed and privacy
A compact native engine with modern codecs, strong encryption, and no cloud dependency.
Adaptive engine
Smart mode analyses each file and routes it to the best codec - LZMA2, Zstandard, Brotli, PPMd or lossless JPEG-XL - automatically.
AES-256 encryption
Authenticated AES-256-GCM encryption with Argon2 key derivation. Optionally encrypt file names too.
Deduplication
Content-defined chunking removes duplicate data within and across files to shrink archives further.
Dictionary & long-range
FYZ Lifetime unlocks dictionary-trained compression and a long-range window for better ratios on large or similar data.
Every common format
Create FYZ, ZIP, 7z, TAR and TAR.GZ. Extract those plus RAR - all from one clean interface.
Native & local
A compact native engine that starts instantly and uses all your CPU cores. Your files never leave your device.
Works with your archives
Create the modern .fyz format and the classics; extract everything common, including RAR.
Create: FYZ, ZIP, 7z, TAR, TAR.GZ • Extract: all of the above plus RAR.
Pick your trade-off
Five compression profiles from fastest to smallest. Or let Smart mode decide per file.
Built for real workflows
Everything you need to pack, protect and manage archives — without leaving your desktop.
Explorer right-click menu
Compress (all profiles), Extract and Browse straight from Windows Explorer — no need to open the app first.
Archive browser
Open an archive and explore its contents before you extract anything.
Selective extraction
Pull out just the files you need instead of unpacking the whole archive.
Split & multi-volume
Split large archives into volumes (CD, DVD, FAT32 or USB presets) and reassemble them bit-for-bit. FYZ Lifetime
Verify integrity
Check an archive against its stored checksums to confirm nothing changed.
Batch queue
Line up multiple compress and extract jobs and run them back to back.
Drag & drop
Drop files straight onto the window to start compressing right away.
Live size & time estimate
See the estimated archive size and time as you tweak the profile — before you commit.
Completion notifications
A native Windows toast lets you know the moment a job finishes.
In-app benchmark
Compare the compression profiles on a sample right inside the app.
Security & privacy by default
Strong, authenticated encryption and end-to-end integrity — all on your machine.
AES-256-GCM + Argon2id
Authenticated AES-256-GCM encryption with a modern, memory-hard Argon2id key derivation.
Encrypted file names
Optionally hide the file list itself, not just the contents.
Ed25519 digital signatures
Sign your .fyz archives so recipients can verify authenticity. FYZ Lifetime
CRC + BLAKE3 integrity
Every block and file carries CRC and BLAKE3 integrity hashes, verified when you extract.
100% local
No cloud, no telemetry, no ads. The only network calls are license activation and the free-tier usage counter — disclosed in the privacy policy.
Real-world test
A representative example from a 2,867-file test on the same PC. Across the full set, FYZ was the smallest and/or fastest in most cases — your results still depend on your data.
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FYZ Archiver — Nitro Smallest
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ZPAQ — ultra (PeaZip)
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PowerArchiver — Extreme
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7-Zip — Ultra
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WinRAR — best Fastest
On this representative 523 MB file, FYZ (Nitro) produced the smallest archive and was faster than the other high-compression tools (7-Zip, PowerArchiver). WinRAR finished fastest but its archive was ~66% larger. Across the full 2,867-file test, FYZ was the smallest and/or fastest in most cases.
Win rate on the high profiles (share of files where FYZ produced the smaller archive)
Win rate = share of files where FYZ (high profiles) produced the smaller archive, from our own 2,867-file testing · times and memory use vary by machine · results depend on your data.
How FYZ compares
Compression ratio depends on your data — FYZ focuses on a modern experience, fair one-time pricing, and privacy.
What only FYZ does
Genuine capabilities you won't find in WinRAR or 7-Zip — no fabricated benchmarks, just features that ship in FYZ.
Adaptive Smart engine
Analyses each file and auto-routes it to the best codec — LZMA2, Zstandard, Brotli, PPMd or lossless JPEG-XL.
Lossless JPEG-XL recompression
Shrinks JPEG photos further and stays fully reversible — bit-for-bit identical when restored.
Reversible ZIP / PNG / gzip repacking
Repacks existing ZIP, PNG and gzip files smaller without changing their contents.
Cross-archive deduplication
Content-defined chunking removes duplicate data within and across files.
Dictionary-trained + long-range compression
Better ratios across many similar files or very large inputs.
One-click per-format profiles
Flash→Nitro presets for .fyz, ZIP, 7z, TAR and TAR.GZ — no manual tuning.
Microsoft Store delivery
Installs clean and updates automatically — no manual installers to chase.
WinRAR and 7-Zip are trademarks of their respective owners. Comparison reflects typical default behaviour and is provided for general guidance.
Plans & pricing
Start free. Unlock everything with a one-time FYZ Lifetime purchase.
Prices shown exclude applicable taxes, which are calculated at checkout.
Free
- Flash, Fast & Smart profiles
- ZIP / 7z / TAR / RAR extraction
- AES-256 encryption
- Selective extraction
- 1024 MB free compression trial
FYZ Lifetime
- Everything in Free
- All compression profiles (up to Nitro)
- Unlimited compression, all formats
- Digital signing & encrypted file names
- Dictionary, long-range & dedup
- Up to 5 devices · no subscription
Enterprise
- Everything in FYZ Lifetime
- RBAC, DLP & tamper-evident audit log
- LDAP mapping, SIEM (CEF) export & HSM
- FIPS-policy mode for regulated environments
- Volume & site licensing · centralised deployment
- Priority support
FYZ Lifetime is a one-time purchase — base $24.99, launch $14.99. No subscription, no renewals. Activate on up to 5 devices. Free-plan compression is capped at a 1024 MB trial; extraction is always free.
Enterprise capabilities (RBAC, DLP, tamper-evident audit log, LDAP, SIEM/CEF and HSM) are provisioned during direct onboarding. FIPS-policy mode is a policy gate for regulated environments — not a CMVP certification.