Developer Tools
Debug APIs, clean content, format data, and run release checks directly in your browser.
A toolkit for developers and ops engineers covering API troubleshooting, JSON/XML data, SEO release checks, regex and strings, SQL and database, auth security, and daily DevOps. Each tool ships with examples and decision notes.
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JSON Formatter
Format, validate, auto-fix & inspect JSON paths
JSON & Data
Timestamp Converter
Convert Unix timestamps
Automation & DevOps
HTML Encode / Decode
Encode & decode HTML entities
Regex & String
Number Base Converter
Convert between binary, octal, decimal & hex
Web Frontend
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
Web Frontend
SQL Formatter
Format and beautify SQL queries instantly
SQL & Database
HMAC Generator
Generate HMAC-SHA1, SHA256, SHA512 online
Security & Auth
Token Generator
Generate secure random tokens online
Security & Auth
URL Parser
Parse, clean, and export URL parts
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
Web Frontend
CSS Minifier
Compress CSS for faster page loads
Web Frontend
cURL to Fetch
Convert cURL commands to JavaScript fetch
API & HTTP
SQL Minifier
Compress SQL queries to one line
SQL & Database
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
Validation
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
SEO & Schema
Gitignore Generator
Generate .gitignore from common templates
Automation & DevOps
Email Header Parser
Parse raw email headers into structured fields
API & HTTP
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
Web Frontend
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
Validation
ULID Parser
Parse ULID timestamp and randomness
Validation
CSV Column Extractor
Extract selected columns from CSV data
JSON & Data
HTTPie to cURL Converter
Convert HTTPie commands to cURL
API & HTTP
Sitemap Validator
Validate sitemap.xml and sitemap index files
SEO & Schema
Meta Tag Analyzer
Analyze SEO meta tags in HTML
SEO & Schema
SQL Insert Generator
Generate SQL INSERT statements from CSV rows
SQL & Database
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
API & HTTP
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
Microsoft Safe Links Decoder
Reveal the original destination wrapped by Outlook and Microsoft 365 Safe Links
Security & Auth
HAR File Viewer and Analyzer
Open HTTP Archive files and inspect requests, errors, sizes and timings
API & HTTP
Basic Auth Decoder
Decode an Authorization Basic header into username and password fields
Security & Auth
Proofpoint URL Decoder
Reveal original destinations wrapped by Proofpoint URL Defense v2 and v3
Security & Auth
JSON to SQL Converter
Generate MySQL, PostgreSQL or SQLite INSERT statements from JSON
SQL & Database
OAuth PKCE Generator
Generate RFC 7636 verifier, S256 challenge and authorization parameters
Security & Auth
AWS Presigned URL Inspector
Inspect SigV4 credential scope, signed headers and expiration without requesting the URL
Security & Auth
SAML Decoder
Decode SAML requests and responses from Base64 or HTTP-Redirect payloads
Security & Auth
X.509 Certificate Decoder
Inspect PEM or DER certificate identity, SANs, validity, usage, and fingerprint
Security & Auth
JSON Schema Generator
Infer Draft 2020-12 or Draft 7 schemas from sample JSON values
JSON & Data
CSR Decoder
Decode PKCS#10 CSR subject, SANs, public key, signature, and fingerprints
Security & Auth
PEM to JWK Converter
Convert RSA or EC SPKI public keys between PEM and JWK with an RFC 7638 thumbprint
Security & Auth
SSH Key Fingerprint
Calculate SHA256 and legacy MD5 fingerprints from an OpenSSH public key
Security & Auth
AWS ARN Parser
Parse AWS ARN partition, service, region, account, resource type, ID, and qualifier
Automation & DevOps
JSON Escape & Unescape
Escape raw text as a JSON string or decode strict and nested JSON string literals
JSON & Data
JSON to Go Struct
Infer nested Go structs, JSON tags, slices, pointers, and optional fields from samples
JSON & Data
JSON to Java Class
Generate Java records or POJO classes with nested models and optional Jackson annotations
JSON & Data
JSON to Rust Struct
Generate nested Rust structs with Serde derives, rename attributes, Vec, and Option fields
JSON & Data
JSON to Kotlin Data Class
Generate nested Kotlin data classes with nullable defaults and kotlinx or Jackson annotations
JSON & Data
GraphQL Formatter
Parse, format, or minify GraphQL operations and summarize variables and fragments
API & HTTP
File Type Detector
Compare file magic bytes, filename extension, browser MIME, and text-content hints locally
Validation
JSON to C# Class Generator
Infer C# records or classes with nested models, nullable types, and JSON serializer attributes
JSON & Data
Cookie Header Parser
Parse a client Cookie request header into named values, detect duplicates, decode percent escapes, and export JSON
API & HTTP
Content-Disposition Parser & Generator
Parse or generate inline and attachment headers with filename and RFC 5987 filename* support
API & HTTP
CSP Header Analyzer
Parse an existing Content-Security-Policy and flag wildcard, unsafe, insecure, duplicate, and missing controls
Security & Auth
Redirect Map Validator
Audit CSV source-to-target maps for duplicate sources, loops, chains, self-redirects, and trailing-slash conflicts
SEO & Schema
OpenAPI Validator
Validate OpenAPI 3.0/3.1 YAML/JSON and locate errors
General Dev
Docker Compose Validator
Validate Docker Compose YAML, services, resource references, and dependencies
General Dev