🛠️ Developer Tools
29 free tools for developers: formatters, generators, testers, converters. All client-side — no server uploads, no account needed.
JSON Formatter & Validator
Format, validate, minify JSON. Error line detection.
AvailableUUID Generator
Generate UUID v4 identifiers. Browser crypto API.
AvailableHash Generator
SHA-256, SHA-1, SHA-512. Web Crypto API.
AvailableRegex Tester
Test regex in real-time. Highlight matches, groups.
AvailableMarkdown Previewer
Live Markdown preview. Write left, see rendered HTML right.
AvailableSQL Formatter
Format SQL. MySQL, PostgreSQL, SQLite. Beautify/minify.
AvailableYAML Validator
Validate YAML, convert to JSON. Error line detection.
AvailableBase64 Encoder & Decoder
Encode and decode Base64 strings. Essential developer utility.
AvailableJWT Decoder
Decode JWT tokens. View header, payload, expiration.
AvailableUnix Timestamp Converter
Convert Unix timestamps to dates and back. Bidirectional.
AvailableURL Encoder & Decoder
Encode/decode URL strings. Percent-encoding tool.
AvailableHTML Entity Encoder & Decoder
Encode/decode HTML entities. XSS prevention.
AvailableCase Converter
UPPER, lower, camelCase, snake_case, 8 formats.
AvailableNumber Base Converter
Binary, octal, decimal, hex. Real-time conversion.
AvailableText Diff Checker
Compare two texts side by side. Color-coded LCS diff.
AvailableAI Token Counter & Cost Estimator
Count tokens, estimate API costs for 12 models.
AvailableCron Expression Builder
Visual cron builder. Human-readable. Presets included.
AvailableJSON Schema Generator
Generate JSON Schema from JSON. Auto-detects types.
AvailableJSON Compare
Compare two JSON objects. Find added/removed/changed keys.
AvailableRegex Explainer
Translate regex to human language. Token-by-token explanation.
AvailableCSV ↔ JSON Converter
CSV ↔ JSON converter. Smart parsing with PapaParse.
AvailableXML Formatter & Validator
Format & validate XML. DOMParser error detection.
AvailableXML ↔ JSON Converter
Bidirectional XML ↔ JSON conversion. Recursive mapping.
AvailableJSONPath Tester
Evaluate JSONPath queries. Select data from JSON.
AvailableRobots.txt Generator
Generate robots.txt. Allow/block crawlers.
AvailableMeta Tag Generator
Generate SEO meta, Open Graph, Twitter Card tags.
AvailableSSH Key Generator
Generate SSH key pairs. RSA, ECDSA. PEM format.
AvailableSERP Preview Tool
Google SERP preview. Title 60, description 160 chars.
AvailableOpen Graph Preview
Social media link preview. Facebook, Twitter, LinkedIn.
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