Developer Tools
JSON, Base64, hashes, regex, JWT and the rest of the daily toolkit. All 23 of them run in your browser — nothing is uploaded.
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Format, validate, minify and explore JSON.
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Encode and decode Base64, including UTF-8 and URL-safe.
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Percent-encoding, done with the right function.
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SHA-256, SHA-512, SHA-1 and MD5 for text or files.
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Bulk v4, v7 and NIL UUIDs from a real CSPRNG.
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Read the header and payload of a token — locally.
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Flatten nested JSON into a spreadsheet-ready table.
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Parse messy CSV into clean JSON.
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Re-indent HTML, CSS, JavaScript, JSON and XML.
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Strip whitespace and comments from CSS, JS and HTML.
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Make a long query readable.
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Convert both directions, and catch indentation errors.
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Test patterns with live highlighting and an explanation.
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Epoch seconds and milliseconds to readable dates.
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Indent, validate and minify XML.
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Read a cron expression in plain English.
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Text to binary, hex, octal and decimal, and back.
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Escape HTML safely, or decode entities back.
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CIDR ranges, masks and usable hosts.
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Octal, symbolic and checkbox — all three in sync.
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Verify a download against its published checksum.
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Encrypt a note with a passphrase, in your browser.
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Classic letter-shift ciphers, with brute force.
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.
- Converters — Units, temperature, time zones, data sizes and number systems.
- Text Tools — Count, compare, clean, transform and read text aloud.
- 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.