Converters
Units, temperature, time zones, data sizes and number systems. All 10 of them run in your browser — nothing is uploaded.
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Length, weight, volume, area, speed, pressure and more.
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Celsius, Fahrenheit, Kelvin and Rankine at once.
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Bytes to KB, MB, GB, TB — decimal and binary.
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What time is it there, and when should we meet?
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Spell out amounts for cheques and contracts.
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Keep proportions right when resizing.
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Convert between any bases from 2 to 36.
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Arabic to Roman and back, both directions.
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Cups to grams, with the ingredient taken into account.
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UK, US, EU and Japanese sizes, with the measurements.
Other categories
- PDF Tools — Merge, split, compress, sign and convert PDF files without uploading a single page.
- Image Tools — Compress, resize, crop and convert photos with Canvas — the fastest tools on the site.
- Calculators — Percentages, loans, dates, mortgages and statistics, with the formula always shown.
- Health & Body — Body measures, energy needs, cycles and sleep — every formula named, and none of it sent anywhere.
- Text Tools — Count, compare, clean, transform and read text aloud.
- Developer Tools — JSON, Base64, hashes, regex, JWT and the rest of the daily toolkit.
- Design & Color — Colour conversion, palettes, gradients, shadows and accessibility checks.
- Generators & Security — QR codes, passwords, UUIDs, signatures, invoices and random pickers.
- Utilities & Media — Timers, recorders, device tests and archive tools that use your hardware directly.
- Office & Productivity — Spreadsheets, CSVs, timesheets, labels and the small jobs that eat an office afternoon.