Free tools that get things done.
Fast, simple and privacy-friendly tools for developers and everyday tasks.
Most tools keep your data on your device No account needed No waiting, no upload
Popular tools
The ones people reach for most.
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JSON Formatter
Format, validate and inspect JSON.
Stays on your device
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Image Compressor
Shrink JPEG, PNG and WebP images without uploading them.
Stays on your device
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JSON Diff
Compare two JSON documents and see exactly what changed.
Stays on your device
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JSON to CSV
Turn JSON into a spreadsheet-ready CSV file.
Stays on your device
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Base64 Encoder / Decoder
Encode text or files to Base64, and decode it back.
Stays on your device
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Image Resizer
Resize an image to any size, in your browser.
Stays on your device
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Timestamp Converter
Convert Unix timestamps to dates, and back.
Stays on your device
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Image Cropper
Crop, rotate and flip an image without uploading it.
Stays on your device
Images
Compress, resize and convert images without uploading them.
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Image Compressor
Shrink JPEG, PNG and WebP images without uploading them.
Stays on your device
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Image Converter
Convert between WebP, JPEG and PNG, and see which is smallest.
Stays on your device
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Image Cropper
Crop, rotate and flip an image without uploading it.
Stays on your device
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Image Resizer
Resize an image to any size, in your browser.
Stays on your device
Developer
JSON, regex, encoding and the other small things.
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Base64 Encoder / Decoder
Encode text or files to Base64, and decode it back.
Stays on your device
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Hash Generator
SHA-256, SHA-384 and SHA-512 for text or a file.
Stays on your device
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JSON Diff
Compare two JSON documents and see exactly what changed.
Stays on your device
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JSON Formatter
Format, validate and inspect JSON.
Stays on your device
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JSON to CSV
Turn JSON into a spreadsheet-ready CSV file.
Stays on your device
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JSON to JSON Schema
Infer a JSON Schema from a sample document.
Stays on your device
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JSON to TypeScript
Generate TypeScript interfaces from a JSON sample.
Stays on your device
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JSON to YAML
Convert JSON into readable YAML.
Stays on your device
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JWT Decoder
Read what a JSON Web Token says — without verifying it.
Stays on your device
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Regex Tester
Test regular expressions against your text, live.
Stays on your device
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URL Encoder / Decoder
Percent-encode and decode URLs and query values.
Stays on your device
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URL Parser
Break a URL into its parts, and strip the tracking off it.
Stays on your device
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UUID Generator
Generate random UUIDs, in bulk.
Stays on your device
Text
Clean up, transform and inspect text.
Numbers & Calculators
Dates, timestamps, units and quick maths.
Why these tools are different
- Your data stays put
- If a job can be done in your browser, it is. Your file never travels to a server, so there is no queue to wait in and no copy of it on someone else’s disk.
- Fast because there’s nothing to wait for
- Each tool loads only its own code. Results appear as you type, without a round trip to a server.
- Free, and honest about it
- No sign-up wall, no watermark, no “upgrade to download”. Where a tool does need a server, the page says so.