Developer Tools
Format, encode, inspect, and test common developer data and expressions. Everything stays on your device.
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No sign-up. No installation. Just open and use.
JSON Formatter, Validator & Minifier
Format, validate, minify, and inspect JSON.
Open toolHTML Formatter
Beautify HTML locally in your browser.
Open toolCSS Formatter & Minifier
Beautify or minify CSS.
Open toolJavaScript Formatter & Minifier
Beautify or minify JavaScript.
Open toolSQL Formatter
Format SQL using your selected dialect.
Open toolMarkdown Preview
Write Markdown and preview the rendered result.
Open toolRegex Tester
Test regular expressions, flags, groups, and replacements.
Open toolBase64 Encoder & Decoder
Encode or decode UTF-8 text with Base64.
Open toolJWT Decoder
Inspect JWT headers and payloads without verifying signatures.
Open toolURL Encoder & Decoder
Encode or decode URL components and complete URLs.
Open toolURL Parser
Break a URL into its protocol, host, path, query parameters, and fragment.
Open toolUUID & Nano ID Generator
Generate UUID v4 values and Nano IDs in batches.
Open toolUnix Timestamp Converter
Convert between dates and Unix timestamps.
Open toolCron Expression Builder
Build and explain standard five-field cron expressions.
Open toolJSON Diff
Compare two JSON documents and inspect semantic path-based differences.
Open toolJSON to YAML
Validate JSON and convert it into readable YAML locally.
Open toolYAML Formatter
Validate and format YAML without executing custom tags.
Open toolXML Formatter
Validate, beautify, or minify XML with external entities disabled.
Open toolCSV to JSON
Convert quoted CSV data into a JSON array with delimiter detection.
Open toolJSON Schema Generator
Infer a reviewable JSON Schema from a sample document.
Open toolGood to know
Your work remains yours
Toollix tools are designed to process inputs locally in your browser. We do not need an account or a file upload server to help you finish the task.