G-Code DevTools - Developer Toolbox

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Base64 Encode / Decode

Convert text and binary data to Base64 and back.

Encoding/base64

URL Encode / Decode

Percent-encode text for safe use in URLs, or decode it back.

Encoding/url-encode

JSON Formatter

Format, indent and inspect JSON with clear error reporting.

JSON/json-formatter

SHA256 Hash Generator

Generate a SHA-256 digest of any text.

Hash & IDs/sha256-hash

Password Generator

Generate strong random passwords with a live strength estimate.

Hash & IDs/password-generator

UUID Generator

Generate v4 and v7 UUIDs in bulk.

Hash & IDs/uuid-generator

Case Converter

Convert text between camelCase, snake_case, kebab-case and more.

Text/case-converter

Regex Tester

Test regular expressions live, with highlighted matches and groups.

Regex/regex-tester

Just added

Newest tools

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Subdomain Finder

Discover subdomains from certificate transparency logs.

Network/subdomain-finder

CIDR Calculator

Compute the network, broadcast, usable host range and address counts for any IPv4 CIDR block or address/prefix pair.

Network/cidr-calculator

Code Formatter

Format or conservatively minify HTML, CSS, JavaScript, JSON, XML, SQL and PHP, one tool for all seven.

Developer/code-formatter

Fake JSON Generator

Turn a one-line-per-field schema into an array of realistic fake JSON records, generated entirely in your browser.

JSON/fake-json

6 tools

Encoding

Convert between text and wire formats.

Base64 Encode / Decode

Convert text and binary data to Base64 and back.

Encoding/base64

URL Encode / Decode

Percent-encode text for safe use in URLs, or decode it back.

Encoding/url-encode

HTML Encode / Decode

Escape HTML entities to prevent markup injection, or decode them.

Encoding/html-encode

Unicode Converter

Convert between characters, code points and escape sequences.

Encoding/unicode-converter

Hex Converter

Convert text to hexadecimal and hex back to text.

Encoding/hex-converter

Binary Converter

Convert text to binary and binary back to text.

Encoding/binary-converter

13 tools

JSON

Format, validate and compact JSON.

JSON Formatter

Format, indent and inspect JSON with clear error reporting.

JSON/json-formatter

JSON Validator

Check whether JSON is valid and see exactly where it breaks.

JSON/json-validator

JSON Minifier

Strip whitespace from JSON to make payloads smaller.

JSON/json-minifier

JSON Prettify

Turn a single line of JSON into something readable.

JSON/json-prettify

YAML to JSON Converter

Turn YAML configuration into JSON, anchors and all.

JSON/yaml-to-json

JSON to YAML Converter

Turn JSON into readable YAML configuration.

JSON/json-to-yaml

CSV to JSON Converter

Turn a spreadsheet export into JSON records.

JSON/csv-to-json

JSON to CSV Converter

Flatten JSON records into a spreadsheet.

JSON/json-to-csv

JSON Diff

Compare two JSON documents and see every key that changed.

JSON/json-diff

JSONPath Tester

Query a JSON document with a JSONPath subset: dot/bracket paths, wildcards, slices, recursive descent, and filters.

JSON/jsonpath-tester

JSON to TypeScript

Turn one JSON example into readable, multi-interface TypeScript types.

JSON/json-to-typescript

JSON to PHP Array

Convert JSON into a paste-ready PHP array literal, with short or long syntax and a variable or define() wrapper.

JSON/json-to-php

Fake JSON Generator

Turn a one-line-per-field schema into an array of realistic fake JSON records, generated entirely in your browser.

JSON/fake-json

8 tools

Hash & IDs

Digests, hashes and unique identifiers.

MD5 Hash Generator

Generate an MD5 digest of any text.

Hash & IDs/md5-hash

SHA1 Hash Generator

Generate a SHA-1 digest of any text.

Hash & IDs/sha1-hash

SHA256 Hash Generator

Generate a SHA-256 digest of any text.

Hash & IDs/sha256-hash

SHA512 Hash Generator

Generate a SHA-512 digest of any text.

Hash & IDs/sha512-hash

bcrypt Generator

Hash a password with bcrypt, or verify one against a hash.

Hash & IDs/bcrypt-generator

Password Generator

Generate strong random passwords with a live strength estimate.

Hash & IDs/password-generator

UUID Generator

Generate v4 and v7 UUIDs in bulk.

Hash & IDs/uuid-generator

NanoID Generator

Generate compact, URL-safe unique IDs.

Hash & IDs/nanoid-generator

8 tools

Text

Transform, count and tidy up text.

Slug Generator

Turn any title into a clean, URL-safe slug.

Text/slug-generator

Lorem Ipsum Generator

Generate placeholder text by paragraph, sentence or word.

Text/lorem-ipsum

Random Text Generator

Generate random strings, words, names and test data.

Text/random-text

Case Converter

Convert text between camelCase, snake_case, kebab-case and more.

Text/case-converter

Remove Duplicate Lines

Strip repeated lines from a list, keeping the order you want.

Text/remove-duplicate-lines

Sort Lines

Sort lines alphabetically, numerically, by length or at random.

Text/sort-lines

Word Counter

Count words, characters, sentences and reading time.

Text/word-counter

Text Diff

Compare two blocks of text and see exactly what changed.

Text/text-diff

2 tools

Regex

Build and test regular expressions.

Regex Tester

Test regular expressions live, with highlighted matches and groups.

Regex/regex-tester

Regex Cheat Sheet

Every regex token, explained, with copyable examples.

Regex/regex-cheatsheet

3 tools

Time

Timestamps, epochs and time zones.

Unix Timestamp Converter

Convert Unix timestamps to dates and back, in any time zone.

Time/unix-timestamp

Epoch Converter

Convert between epoch time and formatted dates in bulk.

Time/epoch-converter

Timezone Converter

Convert a time between any two time zones, DST included.

Time/timezone-converter

11 tools

Developer

Tokens, cron, status codes and headers.

JWT Decoder

Decode a JSON Web Token and inspect its claims.

Developer/jwt-decoder

JWT Encoder

Build and sign a JSON Web Token with HMAC.

Developer/jwt-encoder

Cron Parser

Translate a cron expression into plain English and next run times.

Developer/cron-parser

Cron Generator

Build a cron expression from a schedule you describe.

Developer/cron-generator

HTTP Status Code Lookup

Look up any HTTP status code and what it actually means.

Developer/http-status

MIME Type Lookup

Find the MIME type for any file extension, or the reverse.

Developer/mime-type

User Agent Parser

Break a User-Agent string into browser, engine, OS and device.

Developer/user-agent-parser

HTTP Request Builder

A tiny, honest API client: send real requests from your browser and copy the equivalent cURL, fetch, PHP or Python code.

Developer/http-request-builder

Code Formatter

Format or conservatively minify HTML, CSS, JavaScript, JSON, XML, SQL and PHP, one tool for all seven.

Developer/code-formatter

SQL Formatter

Beautify or minify SQL for MySQL, PostgreSQL, SQLite and SQL Server, without ever executing it.

Developer/sql-formatter

URL Parser

Break any URL into its scheme, host, port, path, query parameters and fragment.

Developer/url-parser

7 tools

Network

Inspect DNS, certificates and addresses.

DNS Lookup

Query A, AAAA, MX, TXT, NS, CNAME, SOA and CAA records.

Network/dns-lookup

Subdomain Finder

Discover subdomains from certificate transparency logs.

Network/subdomain-finder

Whois Lookup

Look up domain registration, ownership and expiry.

Network/whois-lookup

IP Lookup

Inspect an IP address: type, range, reverse DNS and records.

Network/ip-lookup

Reverse DNS Lookup

Find the hostname behind an IP address.

Network/reverse-dns

SSL Certificate Checker

Inspect a site's TLS certificate, chain and expiry.

Network/ssl-checker

CIDR Calculator

Compute the network, broadcast, usable host range and address counts for any IPv4 CIDR block or address/prefix pair.

Network/cidr-calculator

4 tools

Converter

Colours, number bases and units.

RGB to HEX Converter

Convert RGB and HSL colours to hexadecimal.

Converter/rgb-to-hex

HEX to RGB Converter

Convert hex colour codes to RGB, HSL and CSS formats.

Converter/hex-to-rgb

Number Base Converter

Convert numbers between binary, octal, decimal, hex and any base.

Converter/base-converter

Byte Size Converter

Convert between bytes, KB, MB, GB and their binary equivalents.

Converter/byte-converter

6 tools

Image

Inspect and embed image data.

Image to Base64

Convert an image to a Base64 data URI for inline embedding.

Image/image-to-base64

Image Metadata Viewer

Read EXIF, dimensions and camera data from an image.

Image/image-metadata

SVG Preview

Render SVG markup live and export it as a data URI or PNG.

Image/svg-preview

Background Remover

Cut a uniform background out of a logo, product shot or sprite - no AI, no upload.

Image/background-remover

Image Compressor

Resize and re-encode images to JPEG, PNG, WebP, or AVIF, with a real measured before/after file size.

Image/image-compressor

Favicon Generator

Generate a favicon.ico plus every PNG size and the ready-to-paste head tags to match, entirely in your browser.

Image/favicon-generator

5 tools

Security

Check passwords, headers and hashes; obfuscate source before you ship.

JavaScript Obfuscator

Compact and lightly obfuscate JavaScript entirely in your browser - no code ever leaves your machine.

Security/js-obfuscator

PHP Source Encoder / Obfuscator

Obfuscate PHP by stripping comments and renaming identifiers, or encrypt it with real AES-256-GCM - all client-side.

Security/php-obfuscator

HTTP Headers Analyzer

Paste response headers to check them against common security and caching best practices.

Security/http-headers

Password Strength Checker

Estimate a password's entropy, see exactly which weaknesses cost you bits, and get an approximate crack time.

Security/password-strength

Hash Identifier

Identify a hash's likely algorithm from its format and length, with an honest confidence level for every guess.

Security/hash-identifier

3 tools

Misc

Codes, validators and everything else.

QR Code Generator

Generate a QR code for any text, URL, WiFi network or contact.

Misc/qr-generator

Barcode Generator

Generate Code 128 barcodes as scalable SVG.

Misc/barcode-generator

UUID Validator

Validate UUIDs and identify their version and variant.

Misc/uuid-validator