Free Developer Tools
JSON, regex, encoding, hashing, formatting, and debugging tools that run entirely in your browser.
JSON Formatter
Pretty-print and validate JSON with syntax highlighting and tree view.
JSON Compare
Side-by-side JSON diff with added, removed, and changed key highlighting.
JSON Schema Generator
Generate a JSON Schema from any JSON data automatically.
JSON Path Finder
Click any value in a JSON tree to get its dot and bracket notation path.
JSON to CSV
Convert JSON arrays to CSV with custom delimiter and header extraction.
JSON to YAML
Convert JSON to YAML and back. Handles nested objects and arrays.
JSON to TypeScript
Generate TypeScript interfaces from JSON data automatically.
JSON to XML
Convert JSON to XML with proper formatting and indentation.
SQL Formatter
Pretty-print and indent SQL queries with keyword highlighting.
XML Formatter
Format and validate XML with proper indentation.
YAML Formatter
Format, validate, and sort YAML configuration files.
HTML Minifier
Minify HTML to reduce file size by stripping whitespace and comments.
JS Minifier
Minify JavaScript by removing whitespace, comments, and shortening code.
Regex Tester
Test regular expressions with match highlighting, capture groups, and flag options.
Hash Generator
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes for text or files.
JWT Decoder
Decode JWT tokens to inspect header, payload, and expiration details.
Base64 Encoder
Encode and decode Base64 text instantly.
UUID Generator
Generate v4 UUIDs individually or in bulk with copy support.
Text Encrypt/Decrypt
Encrypt and decrypt text using AES-256-GCM with a password.
Cron Expression Generator
Build cron expressions with visual dropdowns and preview next run times.
Cron Expression Explainer
Paste a cron expression and get a plain-English explanation with next 10 runs.
Chmod Calculator
Calculate Unix file permissions from octal to symbolic notation.
IP Subnet Calculator
Calculate subnet masks, network addresses, broadcast, and host ranges.
DNS Lookup
Look up DNS records (A, AAAA, CNAME, MX, TXT, NS, SOA, PTR) via Cloudflare DoH.
Diff Checker
Compare two texts side by side and see insertions, deletions, and changes.
Robots.txt Generator
Generate robots.txt directives for search engine crawlers.
Meta Tag Generator
Generate HTML meta tags for SEO, Open Graph, and Twitter Cards.
OG Preview
Preview how your link will look when shared on Facebook, Twitter, and Slack.
About Our Developer Tools
Absolutool offers 28 developer-focused utilities built for speed and privacy. JSON tools cover formatting, comparison, schema generation, path finding, and conversion to CSV, YAML, TypeScript, and XML. Use the regex tester, hash generator, JWT decoder, Base64 encoder, and UUID generator for everyday dev tasks.
Need to schedule jobs? Build expressions with the cron generator or reverse-engineer existing ones with the cron explainer. Format SQL, HTML, JS, XML, YAML, and CSS in seconds. Calculate Unix permissions, plan IP subnets, and look up DNS records · all without leaving your browser or sending data to a server.