9 tools, all client-side
Tools that respect your privacy
A collection of web tools that run entirely in your browser. No uploads, no servers, no tracking. Just open and use.
- Total tools
- 9
- Categories
- 3
- Data uploaded
- 0
- Cost
- Free
Tools
Categories
Bytes uploaded
Forever
Built different
Most online tools send your data to a server. These don't.
Private by design
Nothing is uploaded. Every calculation and conversion happens locally on your device.
Instantly fast
Tools load only when you open them. No heavy bundles, no waiting, no clutter.
Works offline
Once loaded, tools keep working without a connection. Bookmark them and use anywhere.
Try a tool
A random pick from the collection. Shuffle for more.
Tax Comparer
Compare income tax and take-home pay across 8 countries from one income.
Mortgage Calculator
Estimate monthly mortgage payments from loan amount, rate, and term.
Image Format Converter
Convert images between PNG, JPEG, and WebP in your browser. Batch, resize, and quality control.
Serialization Converter
Convert between BSON, MessagePack, CBOR, JSON, Protobuf, Pickle, Java, and plist.
Tax Calculators
Income tax calculators for 8 countries plus a cross-country tax comparer.
PCAP Analyzer
Inspect pcap/pcapng files: layers, statistics, topology, and packet flows, fully offline.
Explore by category
Ready to dive in?
No sign-up, no install, no data leaving your device. Just tools that work.
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