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Color Converter
Convert HEX, RGB, and HSL values into clean developer-ready color formats.
Opentoolbox.mom
Developer
Developer utilities for JSON, encoding, hashing, URLs, colors, regex, and everyday debugging.
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JSON Diff
Compare two JSON payloads and list changed, added, and removed paths.
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JSON Validator
Validate JSON instantly and format it into a readable structure.
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MD5 Hash
Generate MD5 hashes locally for checksums and legacy integrations.
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Unicode Encoder Decoder
Encode plain text as Unicode escapes or decode escapes back to readable text.
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URL Encoder Decoder
Encode and decode URL components without sending content to a server.
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JSON Formatter
Beautify compact JSON and minify formatted JSON for transport.
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AES Encrypt Decrypt
Encrypt and decrypt text locally with password-based AES-GCM.
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URL Parser
Break a URL into protocol, host, path, query parameters, and hash.
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Random Password Generator
Generate strong local passwords with length and character-set controls.
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Base64 Encoder Decoder
Encode Unicode text as Base64 or decode Base64 back to text.
OpenNew
Markdown Editor
Draft Markdown and preview headings, emphasis, links, lists, and code blocks.
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Regex Tester
Test JavaScript regular expressions and inspect every match.
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YAML JSON Converter
Convert JSON to readable YAML and parse simple YAML maps back to JSON.
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User-Agent Tool
Read and lightly parse the current browser User-Agent string.
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Hello World Generator
Generate Hello World snippets for common programming languages.
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UUID Generator
Generate RFC 4122 style UUID values locally in the browser.
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