Path 01
JSON and tabular data
Validate documents, inspect nested values, and move records between JSON, JSON Lines, and CSV.
25 tools online
Developer Tools
Format, convert, encode, hash, escape, and inspect development data.
Start with the task
Choose the developer workflow you need
Each path groups tools by the work they perform. Every tool still appears in the complete directory below.
Path 02
URLs and web text
Inspect addresses and query parameters, then encode components, entities, or Unicode escapes.
Path 03
Encodings and numeric formats
Convert text encodings, integer bases, timestamps, and web color representations.
Path 04
Identifiers and security data
Generate or inspect identifiers, digests, authentication codes, tokens, and Unix permission bits.
Path 05
Code inspection and cleanup
Test JavaScript expressions, format XML, and remove unnecessary CSS whitespace.
All developer tools
Browse the complete collection, including specialized utilities that do not fit a single workflow.
JSON Formatter
Format, validate, minify, and copy JSON instantly.
Developer ToolsOnline
Base64 Encoder
Encode UTF-8 text to Base64 or decode it back.
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URL Encoder & Decoder
Encode or decode UTF-8 URI components in your browser.
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JWT Decoder
Inspect JWT header and payload JSON without uploading the token.
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SHA Hash Generator
Calculate SHA-256, SHA-384, or SHA-512 for text and files.
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Unix Timestamp Converter
Convert Unix seconds, milliseconds, UTC, and local dates.
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HTML Entity Encoder
Encode HTML-sensitive characters or decode common entities.
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JSON to CSV Converter
Convert a JSON array of objects into downloadable CSV.
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CSV to JSON Converter
Convert quoted comma, semicolon, or tabular data into JSON.
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Query String Parser
Decode URL query parameters, repeated keys, and normalized output.
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UUID Generator
Generate random version 4 UUIDs in standard or compact format.
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Regex Tester
Test JavaScript patterns, flags, match indexes, and capture groups.
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XML Formatter
Validate XML and indent element structures without uploading data.
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CSS Minifier
Remove CSS comments and excess whitespace while preserving strings.
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Color Format Converter
Convert HEX, RGB, and HSL colors with previews and contrast ratios.
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URL Parser
Inspect URL components, resolution, and repeated query parameters.
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Number Base Converter
Convert exact signed integers between bases 2 and 36.
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JSON String Escape & Unescape
Escape or unescape JSON strings online with syntax validation.
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HMAC Generator
Generate SHA-256, SHA-384, or SHA-512 HMAC authentication codes.
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JSON Property Path Inspector
Resolve a direct object or array path in a JSON document.
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Base32 Encoder & Decoder
Encode UTF-8 text as RFC 4648 Base32 or decode it locally.
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JSON Lines Converter
Convert newline-delimited JSON records to and from a JSON array.
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Unix Permission Calculator
Convert Unix octal file modes into symbolic permission flags.
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UUID Inspector
Validate a UUID and inspect its version, variant, and raw bytes.
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Unicode Escape Converter
Convert Unicode text to code-point or JavaScript escape notation.
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