dev-tools
JSON Formatter
Format JSON with readable indentation.
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Format, validate, and inspect developer data formats in seconds.
dev-tools
JSON Minifier
Minify JSON by removing extra whitespace.
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JSON Validator
Validate JSON input and return syntax status.
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UUID Generator
Generate UUID v4 values instantly.
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Base64 Encode / Decode
Encode plain text to Base64 or decode Base64 text.
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Unix Timestamp Converter
Convert Unix timestamps to readable ISO dates and back.
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HTML Formatter
Format HTML into a readable structure.
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HTML Minifier
Minify HTML by removing unnecessary spaces.
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CSS Minifier
Minify CSS for smaller payload size.
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CSS Formatter
Format CSS with consistent spacing and line breaks.
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JS Minifier
Minify JavaScript for compact output.
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URL Encoder
Encode URLs and query values safely.
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URL Decoder
Decode URL-encoded text instantly.
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Query String Parser
Parse query strings into JSON key-value data.
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Query String Builder
Build query strings from line-based key-value input.
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JWT Decoder
Decode JWT header and payload without verifying signature.
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Regex Tester
Test regular expressions and inspect live matches.
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Hash Generator
Generate MD5, SHA1, or SHA256 hashes from plain text.
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HTTP Header Parser
Parse raw HTTP headers into structured JSON.
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FAQ
Are these developer tools free?
Yes. Every tool in this category is free to use on ToolHarbor.
Do I need to register?
No signup is required to run ToolHarbor tools.