Developer Tools Suite
High-performance, client-side tools for software developers. Format JSON/XML/SQL, minify CSS/JS, test Regex, decode JWTs, generate UUIDs & hashes, and convert timestamps — 100% private in browser memory.
JSON Formatter & Beautifier
Format, beautify, and clean messy JSON strings with customizable indentation (2 spaces, 4 spaces, tabs) and key sorting.
JSON Validator & Error Checker
Validate JSON syntax in real time with line-by-line error location, column positions, and precise syntax feedback.
JSON Tree Viewer
Inspect complex JSON objects in an interactive collapsible tree view with data type colors and node depth controls.
XML Formatter & Beautifier
Pretty-print and indent XML documents with proper nesting, tag alignment, and configurable space indentation.
XML Validator
Verify XML syntax validity, detect unclosed tags, mismatched attributes, and structural errors.
YAML ↔ JSON Converter
Convert YAML to JSON and JSON to YAML bi-directionally with high fidelity and proper indentation.
SQL Formatter & Query Cleaner
Format SQL queries by auto-capitalizing keywords (SELECT, FROM, WHERE, JOIN) and indenting nested clauses.
HTML Formatter & Beautifier
Clean, indent, and format messy HTML strings with customizable tag indentation and element grouping.
CSS Minifier
Compress CSS code by removing white spaces, comments, and redundant semicolons to reduce payload size.
CSS Beautifier & Unminifier
Unminify and format compact CSS stylesheets into clean, structured rules with consistent indentation.
JavaScript Minifier
Minify JavaScript code by stripping comments and redundant white space for faster web page load times.
JavaScript Beautifier & Unminifier
Format and unminify compact JavaScript code with clear line breaks, proper braces, and clean indentation.
Markdown Live Preview
Write Markdown and see instant live HTML side-by-side preview with GitHub-flavored styling support.
Markdown Editor & HTML Exporter
Interactive Markdown editor with quick toolbar buttons for bold, italic, headings, links, and HTML export.
Regex Tester & Matcher
Test JavaScript regular expressions in real time with flag toggles (g, i, m, s), match highlighting, and substitution.
UUID / GUID Generator
Generate bulk cryptographically secure Universally Unique Identifiers (UUID v4) with custom formatting options.
UUID Validator
Validate UUID string formats, determine UUID version (v1, v3, v4, v5), and inspect variant bits.
JWT Decoder & Inspector
Decode JSON Web Tokens (JWT) into Header, Payload, and Signature without sending secret keys anywhere.
JWT Encoder Builder
Construct unsigned or HMAC-SHA256 signed JSON Web Tokens (JWT) by editing header and payload JSON objects.
Base64 Encoder & Decoder
Encode plain text to Base64 and decode Base64 strings back to text with full UTF-8 Unicode support.
URL Encoder
Encode special characters in query parameters and URLs using standard percent-encoding (encodeURIComponent).
URL Decoder
Decode percent-encoded URL strings (%20, %2F, %3D, etc.) back into readable plain text.
HTML Entity Encoder
Convert special HTML characters (&, <, >, ", ') into safe HTML entity names or numeric codes to prevent XSS.
HTML Entity Decoder
Convert HTML entity codes (<, >, ©) back into raw readable characters and symbols.
Hash Generator (MD5, SHA-1, SHA-256, SHA-512)
Generate cryptographic hashes (MD5, SHA-1, SHA-256, SHA-512) for text inputs in real time.
Unix Timestamp Converter
Convert Unix Epoch timestamps (seconds & milliseconds) to UTC / local date-time strings and vice versa.
Cron Expression Generator & Parser
Build, edit, and parse 5-part cron schedule expressions into clear human-readable descriptions.
Frequently Asked Questions
Is my code or data uploaded to servers?
No! All formatting, minifying, validation, and decoding operations run 100% locally in your browser memory.
Are these tools free to use?
Yes, all 27 Developer Tools are completely free with zero limitations or registration required.