Free Online Developer Tools
Format, validate, encode, decode and generate data without opening a heavy IDE. These browser tools cover common web, API, text and CSS workflows.
JSON Formatter
Format, validate and inspect JSON data.
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Find real differences between two JSON files, ignoring key order.
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XML Formatter
Format and clean XML documents.
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Base64 Encoder
Encode and decode Base64 text or files.
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URL Encoder
Encode and decode URL components safely.
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JWT Decoder
Decode JWT headers and payloads locally.
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Hash Generator
Generate MD5, SHA-1 and SHA-256 hashes.
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UUID Generator
Create random UUIDs for testing and development.
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Regex Tester
Test regular expressions against sample text.
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Timestamp Converter
Convert Unix timestamps and readable dates.
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CSS Gradient Generator
Create gradients and copy CSS output.
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CSS Shadow Generator
Build box-shadow and text-shadow CSS visually.
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CSV to SQL
Convert CSV data into SQL insert statements.
Use toolDeveloper utilities for small daily jobs
Use these free online developer tools for API debugging, data cleanup, encoding, decoding, CSS generation and test-data creation. The tools are lightweight and focused on one task at a time.
Common use cases
- Format and validate JSON or XML before sharing API payloads.
- Encode, decode and inspect Base64, URLs, JWTs and timestamps.
- Generate hashes, UUIDs, CSS gradients and shadows for development work.