Open source · Browser-only · No login

Every tool a developer needs.

Format, convert, encode, hash, diff, generate — everything runs in your browser. Nothing sent to a server.

All Categories

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JSON

21 tools JSON Formatter · JSON Validator · JSON Minifier
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XML

10 tools XML Formatter · XML Validator · XML to JSON Converter
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YAML

11 tools YAML Formatter · YAML Minifier · YAML Validator
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CSV

10 tools CSV to JSON · CSV to XML · CSV to YAML
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TOML

8 tools TOML Formatter · TOML Validator · TOML to JSON
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Text

13 tools Word & Character Counter · Lorem Ipsum Generator · Markdown to HTML
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Encode / Decode

8 tools Base64 Encode / Decode · URL Encode / Decode · HTML Entity Encode / Decode
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QR

3 tools QR Code Generator · QR Code Reader · Barcode Generator

Crypto

9 tools Hash Generator · HMAC Generator · File Hash Calculator
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AI

3 tools LLM Token Counter · Prompt Token Optimizer · System Prompt Builder
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Generators

5 tools Fake Data Generator · UUID Batch Generator · Password Generator
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PDF

6 tools PDF Viewer · PDF to Text · PDF Merge
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Image

6 tools Image Resizer · Image Format Converter · SVG Optimizer
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Web & Network

1 tool URL Parser