Developer
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Practical developer utilities for API debugging, data formatting, and daily engineering workflows.
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JSON Formatter
Format, validate, auto-fix & inspect JSON paths
Validation
Timestamp Converter
Convert Unix timestamps
General Dev
HTML Encode / Decode
Encode & decode HTML entities
General Dev
Number Base Converter
Convert between binary, octal, decimal & hex
General Dev
JWT Decoder
Decode & inspect JWT tokens
Security & Auth
Regex Tester
Test regular expressions with live match highlighting
Regex & String
Crontab Generator
Build cron expressions with human-readable preview
Automation & DevOps
chmod Calculator
Convert chmod numeric and symbolic permissions
Automation & DevOps
IPv4 Subnet Calculator
Calculate subnet, hosts, CIDR and binary details
General Dev
SQL Formatter
Format and beautify SQL queries instantly
General Dev
HMAC Generator
Generate HMAC-SHA1, SHA256, SHA512 online
Security & Auth
Token Generator
Generate secure random tokens online
Security & Auth
URL Parser
Parse and edit URLs online
JSON & Data
XML Formatter
Format and minify XML online
JSON & Data
JSON to TypeScript
Generate TypeScript interfaces from JSON
JSON & Data
HTTP Status Codes
Reference for all HTTP status codes
API & HTTP
MIME Type List & Content-Type Reference
Find MIME types by extension (png, jpg, mp3, pdf, json) with copy-ready output
API & HTTP
JSON Minifier
Minify JSON and reduce payload size
JSON & Data
HTML Minifier
Minify HTML and remove unnecessary bytes
General Dev
CSS Minifier
Compress CSS for faster page loads
General Dev
cURL to Fetch
Convert cURL commands to JavaScript fetch
API & HTTP
SQL Minifier
Compress SQL queries to one line
General Dev
User-Agent Parser
Parse browser, OS, device from UA string
API & HTTP
HTTP Headers Parser (Raw Header to JSON)
Parse raw HTTP request/response headers into structured JSON
API & HTTP
JSON Schema Validator
Validate JSON data against JSON Schema
SEO & Schema
JSON Diff
Compare two JSON objects with path-level changes
JSON & Data
Query String Parser
Convert query strings and JSON objects both ways
JSON & Data
UTM Builder
Build tracked URLs with UTM parameters
SEO & Schema
Meta Tag Generator
Generate SEO and Open Graph meta tags
SEO & Schema
Robots.txt Generator
Generate robots.txt rules for crawlers
SEO & Schema
Sitemap Generator
Generate sitemap.xml from URL lists
SEO & Schema
SemVer Tools
Compare versions and suggest bumps
Automation & DevOps
CSP Generator
Generate Content Security Policy headers
Security & Auth
Regex Replacer
Find and replace text using regular expressions
Regex & String
HTTP Header Generator
Generate HTTP request header blocks
API & HTTP
Redirect Rule Generator
Generate Nginx and Apache redirect rules
Automation & DevOps
Gitignore Generator
Generate .gitignore from common templates
Automation & DevOps
Email Header Parser
Parse raw email headers into structured fields
General Dev
Changelog Generator
Generate structured changelog entries
Automation & DevOps
FAQ Schema Generator
Generate FAQPage JSON-LD structured data
SEO & Schema
Breadcrumb Schema Generator
Create BreadcrumbList JSON-LD markup
SEO & Schema
Organization Schema Generator
Generate Organization JSON-LD markup
SEO & Schema
Hreflang Generator
Generate hreflang alternate link tags
SEO & Schema
Meta Robots Generator
Generate robots meta tag directives
SEO & Schema
UUID Validator
Validate UUID format/version in bulk for API payload and DB QA
Validation
Email Validator
Validate email address format
Validation
SRI Hash Generator
Generate SHA256/384/512 integrity hashes
Security & Auth
IBAN Validator
Validate IBAN account numbers
Validation
Credit Card Validator
Validate card number with Luhn check
Validation
Regex Escape
Escape and unescape regex special chars
Regex & String
JSON Key Extractor
Extract key paths from JSON
JSON & Data
URL Canonicalizer
Normalize URLs and remove tracking params
SEO & Schema
CSS Specificity Calculator
Calculate selector specificity score
Validation
JSON Sorter
Sort JSON keys recursively
JSON & Data
JSON Flatten / Unflatten
Convert nested JSON to flat key paths
JSON & Data
Cron Parser
Parse cron expressions and preview next runs
Automation & DevOps
JSON Path Extractor
Extract JSON values with path expressions
JSON & Data
XPath Tester
Run XPath queries on XML or HTML
JSON & Data
Snowflake ID Parser
Decode and generate Snowflake IDs
Automation & DevOps
ULID Parser
Parse ULID timestamp and randomness
JSON & Data
CSV Column Extractor
Extract selected columns from CSV data
JSON & Data
HTTPie to cURL Converter
Convert HTTPie commands to cURL
Automation & DevOps
Sitemap Validator
Validate sitemap.xml and sitemap index files
Automation & DevOps
Meta Tag Analyzer
Analyze SEO meta tags in HTML
Automation & DevOps
SQL Insert Generator
Generate SQL INSERT statements from CSV rows
JSON & Data
JSON FormData Converter
Convert nested JSON to FormData fields
JSON & Data
HTTP Request Builder
Build cURL and fetch requests from structured inputs
API & HTTP
Robots.txt Validator
Validate robots directives and detect common SEO mistakes
SEO & Schema
Basic Auth Generator
Generate HTTP Basic Authorization header from credentials
Security & Auth
JSON Line Counter
Count JSONL records and detect invalid rows quickly
JSON & Data
URL Query Cleaner
Clean tracking params and normalize URL query strings
SEO & Schema
Content-Type Parser (MIME, Charset, Boundary)
Parse Content-Type headers and extract MIME parameters
API & HTTP
Content-Type Generator (MIME Header Builder)
Generate valid Content-Type headers with charset and boundary
API & HTTP
Data URL Parser
Parse data: URLs and preview decoded payload content
JSON & Data
Set-Cookie Parser
Parse Set-Cookie headers into name, value, flags, and attributes
API & HTTP
Cache-Control Parser
Parse Cache-Control directives and inspect TTL and conflicts
API & HTTP
CORS Header Generator
Generate Access-Control-* headers for API and preflight responses
API & HTTP