All Tools

Every tool, one app

95 developer tools for formatting, encoding, converting, generating, and inspecting.

Every tool runs offline. Your data never leaves your machine.

Formatters

13
JSON Formatter & Validator — Format, validate, repair, and minify JSON

JSON Formatter & Validator

Format, validate, repair, and minify JSON

JSON Expand Nested Strings — Recursively parse stringified JSON values nested inside JSON objects

JSON Expand Nested Strings

Recursively parse stringified JSON values nested inside JSON objects

SQL Formatter — Format SQL queries for PostgreSQL, MySQL, SQLite, SQL Server, and more

SQL Formatter

Format SQL queries for PostgreSQL, MySQL, SQLite, SQL Server, and more

HTML Beautify / Minify — Beautify or minify HTML markup

HTML Beautify / Minify

Beautify or minify HTML markup

CSS Beautify / Minify — Beautify or minify CSS stylesheets

CSS Beautify / Minify

Beautify or minify CSS stylesheets

JS Beautify / Minify — Beautify or minify JavaScript code

JS Beautify / Minify

Beautify or minify JavaScript code

XML Beautify / Minify — Beautify or minify XML documents

XML Beautify / Minify

Beautify or minify XML documents

SCSS Beautify / Minify — Beautify or minify SCSS stylesheets

SCSS Beautify / Minify

Beautify or minify SCSS stylesheets

LESS Beautify / Minify — Beautify or minify LESS stylesheets

LESS Beautify / Minify

Beautify or minify LESS stylesheets

ERB Beautify / Minify — Beautify or minify ERB templates for Ruby on Rails

ERB Beautify / Minify

Beautify or minify ERB templates for Ruby on Rails

SVG Optimizer — Optimize SVG files with SVGO — strip metadata, minify paths

SVG Optimizer

Optimize SVG files with SVGO — strip metadata, minify paths

Log Timestamp Normalizer — Normalize mixed timestamp formats in log lines to a single target format

Log Timestamp Normalizer

Normalize mixed timestamp formats in log lines to a single target format

Scratchpad — A fast scratchpad with optional auto-format for JSON, JS, HTML, CSS, SQL, and Markdown

Scratchpad

A fast scratchpad with optional auto-format for JSON, JS, HTML, CSS, SQL, and Markdown

Encode / Decode

12
Base64 String Encode/Decode — Encode and decode Base64 strings (unicode-safe)

Base64 String Encode/Decode

Encode and decode Base64 strings (unicode-safe)

Base64 Image Encode/Decode — Convert images to Base64 data URIs and back

Base64 Image Encode/Decode

Convert images to Base64 data URIs and back

GZip Compress / Decompress — Compress text to gzipped Base64 or decompress gzipped data

GZip Compress / Decompress

Compress text to gzipped Base64 or decompress gzipped data

JWT Debugger — Decode JWT tokens, inspect claims, verify signatures, and sign new tokens

JWT Debugger

Decode JWT tokens, inspect claims, verify signatures, and sign new tokens

URL Encode/Decode — Percent-encode and decode URL strings

URL Encode/Decode

Percent-encode and decode URL strings

URL Parser — Break a URL into components and query parameters

URL Parser

Break a URL into components and query parameters

HTML Entity Encode/Decode — Escape and unescape HTML entities

HTML Entity Encode/Decode

Escape and unescape HTML entities

Backslash Escape/Unescape — Escape or unescape backslash sequences (\n, \t, \", \uXXXX…)

Backslash Escape/Unescape

Escape or unescape backslash sequences (\n, \t, \", \uXXXX…)

Hex ⇄ Text — Convert between text and hexadecimal bytes (UTF-8)

Hex ⇄ Text

Convert between text and hexadecimal bytes (UTF-8)

PHP Serializer — Serialize JSON data into PHP serialize() format

PHP Serializer

Serialize JSON data into PHP serialize() format

PHP Unserializer — Decode PHP serialize() strings into readable JSON

PHP Unserializer

Decode PHP serialize() strings into readable JSON

EXIF / Metadata Stripper — Remove EXIF, GPS, XMP and other metadata from photos — lossless

EXIF / Metadata Stripper

Remove EXIF, GPS, XMP and other metadata from photos — lossless

Converters

26
Unix Time Converter — Convert between Unix timestamps and human-readable dates

Unix Time Converter

Convert between Unix timestamps and human-readable dates

YAML to JSON — Convert YAML documents to JSON

YAML to JSON

Convert YAML documents to JSON

JSON to YAML — Convert JSON documents to YAML

JSON to YAML

Convert JSON documents to YAML

CSV to JSON — Convert CSV data to a JSON array

CSV to JSON

Convert CSV data to a JSON array

JSON to CSV — Convert a JSON array of objects to CSV

JSON to CSV

Convert a JSON array of objects to CSV

XML ⇄ JSON — Convert XML documents to JSON and back

XML ⇄ JSON

Convert XML documents to JSON and back

Number Base Converter — Convert numbers between binary, octal, decimal, hex and any base 2–36

Number Base Converter

Convert numbers between binary, octal, decimal, hex and any base 2–36

JSON Schema Generator — Infer a JSON Schema (draft 2020-12) from sample JSON

JSON Schema Generator

Infer a JSON Schema (draft 2020-12) from sample JSON

JSON Patch (RFC 6902) — Apply, generate, or validate JSON Patch operations per RFC 6902

JSON Patch (RFC 6902)

Apply, generate, or validate JSON Patch operations per RFC 6902

.env ⇄ JSON — Convert between dotenv files and JSON objects

.env ⇄ JSON

Convert between dotenv files and JSON objects

JSON to Code — Generate typed models from JSON (TypeScript, Swift, Kotlin, Go…)

JSON to Code

Generate typed models from JSON (TypeScript, Swift, Kotlin, Go…)

cURL to Code — Convert a curl command into fetch, Python requests or axios code

cURL to Code

Convert a curl command into fetch, Python requests or axios code

HTML to JSX — Convert HTML markup to React JSX — attributes, inline styles, SVG props, entities, fragments

HTML to JSX

Convert HTML markup to React JSX — attributes, inline styles, SVG props, entities, fragments

PHP to JSON — Convert a PHP array literal to JSON

PHP to JSON

Convert a PHP array literal to JSON

JSON to PHP — Convert JSON to a PHP array literal

JSON to PHP

Convert JSON to a PHP array literal

String Case Converter — Convert a string into every naming convention at once

String Case Converter

Convert a string into every naming convention at once

Color Converter — Convert colors between hex, RGB, HSL, HSV, HWB, CMYK, UIColor and named formats

Color Converter

Convert colors between hex, RGB, HSL, HSV, HWB, CMYK, UIColor and named formats

SVG to CSS — Turn an SVG into a CSS background-image data-URI snippet

SVG to CSS

Turn an SVG into a CSS background-image data-URI snippet

SVG to React Component — Convert SVG markup into React, React Native, or Vue components with prop spreading

SVG to React Component

Convert SVG markup into React, React Native, or Vue components with prop spreading

Image Compress & Convert — Compress images, convert between WebP/JPEG/PNG and resize — fully offline

Image Compress & Convert

Compress images, convert between WebP/JPEG/PNG and resize — fully offline

Image Cropper — Crop images to specific dimensions or aspect ratios — PNG, JPEG, WebP output

Image Cropper

Crop images to specific dimensions or aspect ratios — PNG, JPEG, WebP output

Chmod Calculator — Convert between octal and symbolic unix file permissions

Chmod Calculator

Convert between octal and symbolic unix file permissions

Markdown Preview — Render Markdown (GFM) as HTML with live preview

Markdown Preview

Render Markdown (GFM) as HTML with live preview

HTML Preview — Render HTML in a sandboxed preview (no scripts, no network)

HTML Preview

Render HTML in a sandboxed preview (no scripts, no network)

Date Difference Calculator — Calculate the difference between two dates in days, hours, minutes, seconds, and business days

Date Difference Calculator

Calculate the difference between two dates in days, hours, minutes, seconds, and business days

Unit Converter — Convert between units — data sizes (binary/decimal), time, length, weight, temperature, angle, speed

Unit Converter

Convert between units — data sizes (binary/decimal), time, length, weight, temperature, angle, speed

Generators

15
Color Palette Generator — Generate color palettes and harmonies — complementary, analogous, triadic, tetradic, split-complement, monochromatic

Color Palette Generator

Generate color palettes and harmonies — complementary, analogous, triadic, tetradic, split-complement, monochromatic

UUID/ULID Generate/Decode — Generate UUIDs/ULIDs in bulk, or decode one from the input

UUID/ULID Generate/Decode

Generate UUIDs/ULIDs in bulk, or decode one from the input

Hash Generator — MD5 / SHA / CRC32 / Blake hashes and HMACs of the input text

Hash Generator

MD5 / SHA / CRC32 / Blake hashes and HMACs of the input text

Bcrypt Hash/Verify — Hash text with bcrypt or verify text against a bcrypt hash

Bcrypt Hash/Verify

Hash text with bcrypt or verify text against a bcrypt hash

TOTP Generator — Generate time-based one-time passwords (RFC 6238) from a base32 secret or otpauth URI

TOTP Generator

Generate time-based one-time passwords (RFC 6238) from a base32 secret or otpauth URI

Basic Auth Generator — Build or decode an HTTP Basic Authorization header from user:password

Basic Auth Generator

Build or decode an HTTP Basic Authorization header from user:password

QR Code Generator — Generate a QR code (SVG) from any text or URL

QR Code Generator

Generate a QR code (SVG) from any text or URL

App Icon / Favicon Set — Drop one image (512px+ recommended) and get every favicon and app-icon size, ready to save

App Icon / Favicon Set

Drop one image (512px+ recommended) and get every favicon and app-icon size, ready to save

JWT Key Generator — Generate cryptographically secure keys for every JWT algorithm — HMAC, RSA, ECDSA, EdDSA

JWT Key Generator

Generate cryptographically secure keys for every JWT algorithm — HMAC, RSA, ECDSA, EdDSA

Certificate Generator — Generate self-signed X.509 certificates with RSA, ECDSA, or Ed25519 keys

Certificate Generator

Generate self-signed X.509 certificates with RSA, ECDSA, or Ed25519 keys

Mock Data Faker — Generate realistic mock data from JSON templates with {{faker}} placeholders

Mock Data Faker

Generate realistic mock data from JSON templates with {{faker}} placeholders

Stateless Password Generator — Derive deterministic passwords from a master secret and site name — same inputs always produce the same password

Stateless Password Generator

Derive deterministic passwords from a master secret and site name — same inputs always produce the same password

htpasswd Generator — Generate htpasswd entries with bcrypt, apr1 (Apache MD5), or SHA1 hashing

htpasswd Generator

Generate htpasswd entries with bcrypt, apr1 (Apache MD5), or SHA1 hashing

Lorem Ipsum Generator — Generate placeholder text: paragraphs, sentences, words, names, emails, URLs, tweets

Lorem Ipsum Generator

Generate placeholder text: paragraphs, sentences, words, names, emails, URLs, tweets

Random String Generator — Generate cryptographically random strings and passwords

Random String Generator

Generate cryptographically random strings and passwords

Inspectors

29
RegExp Tester — Test a regular expression against a string, inspect matches and groups

RegExp Tester

Test a regular expression against a string, inspect matches and groups

Text Diff Checker — Compare two texts by characters, words or lines

Text Diff Checker

Compare two texts by characters, words or lines

JSON Diff — Structural comparison of two JSON documents — key order and formatting ignored

JSON Diff

Structural comparison of two JSON documents — key order and formatting ignored

Certificate Decoder (X.509) — Decode a PEM certificate — subject, issuer, validity, SANs, fingerprints

Certificate Decoder (X.509)

Decode a PEM certificate — subject, issuer, validity, SANs, fingerprints

QR Code Reader — Read a QR code from a dropped or pasted image

QR Code Reader

Read a QR code from a dropped or pasted image

XML Validator — Validate XML well-formedness with line numbers; check elements against an XSD

XML Validator

Validate XML well-formedness with line numbers; check elements against an XSD

Color Contrast Checker (WCAG) — Check text/background contrast against WCAG AA and AAA

Color Contrast Checker (WCAG)

Check text/background contrast against WCAG AA and AAA

Color Blindness Simulator — Simulate how a color appears with protanopia, deuteranopia and tritanopia

Color Blindness Simulator

Simulate how a color appears with protanopia, deuteranopia and tritanopia

String Inspector — Inspect length, words, lines, bytes and unicode code points

String Inspector

Inspect length, words, lines, bytes and unicode code points

LLM Token Counter — Count GPT tokens for prompts, with per-token breakdown

LLM Token Counter

Count GPT tokens for prompts, with per-token breakdown

Cron Job Parser — Explain a cron expression and list its next run times

Cron Job Parser

Explain a cron expression and list its next run times

CIDR / Subnet Calculator — Expand an IPv4 CIDR block: network, broadcast, mask, host range

CIDR / Subnet Calculator

Expand an IPv4 CIDR block: network, broadcast, mask, host range

Line Sort/Dedupe — Sort, deduplicate, reverse and trim lines of text

Line Sort/Dedupe

Sort, deduplicate, reverse and trim lines of text

Line Filter (grep) — Filter lines by plain text, keywords or a regex — like grep, but visual

Line Filter (grep)

Filter lines by plain text, keywords or a regex — like grep, but visual

List Comparer — Set operations on two lists — intersection, union, differences

List Comparer

Set operations on two lists — intersection, union, differences

Data / IOC Extractor — Pull emails, URLs, IPs, domains, hashes, UUIDs and MACs out of any text

Data / IOC Extractor

Pull emails, URLs, IPs, domains, hashes, UUIDs and MACs out of any text

User-Agent Parser — Break a user-agent string into browser, engine, OS, device and CPU

User-Agent Parser

Break a user-agent string into browser, engine, OS, device and CPU

HTTP Status Codes — Look up HTTP status codes by number or search by name/description

HTTP Status Codes

Look up HTTP status codes by number or search by name/description

MIME Type Lookup — Look up MIME types by file extension, or extensions by MIME type

MIME Type Lookup

Look up MIME types by file extension, or extensions by MIME type

Password Strength — Estimate password entropy, weaknesses and crack time

Password Strength

Estimate password entropy, weaknesses and crack time

Semver Range Tester — Parse semver versions and test them against range expressions (npm/cargo/go syntax)

Semver Range Tester

Parse semver versions and test them against range expressions (npm/cargo/go syntax)

K8s / Compose Validator — Validate Kubernetes manifests and docker-compose files — check required fields, containers, and structure

K8s / Compose Validator

Validate Kubernetes manifests and docker-compose files — check required fields, containers, and structure

HTTP Header Analyzer — Parse HTTP headers, explain their purpose, and flag missing security headers

HTTP Header Analyzer

Parse HTTP headers, explain their purpose, and flag missing security headers

HTTP Request Analyzer — Parse raw HTTP requests or cURL commands — breakdown method, URL, headers, body, and generate code snippets

HTTP Request Analyzer

Parse raw HTTP requests or cURL commands — breakdown method, URL, headers, body, and generate code snippets

Hexdump Viewer — Display text, hex, or base64 data as a classic hexdump with offset, hex bytes, and ASCII

Hexdump Viewer

Display text, hex, or base64 data as a classic hexdump with offset, hex bytes, and ASCII

Protobuf / ASN.1 Decoder — Decode protobuf wire format (without schema) or parse ASN.1 DER/BER TLV structure

Protobuf / ASN.1 Decoder

Decode protobuf wire format (without schema) or parse ASN.1 DER/BER TLV structure

REST / GraphQL Client — Parse HTTP requests or cURL commands — breakdown, code snippets (fetch, httpie), GraphQL detection

REST / GraphQL Client

Parse HTTP requests or cURL commands — breakdown, code snippets (fetch, httpie), GraphQL detection

DNS Record Explainer — Parse and explain DNS zone file records — A, AAAA, CNAME, MX, TXT, SRV, NS, SOA, CAA, PTR with security checks

DNS Record Explainer

Parse and explain DNS zone file records — A, AAAA, CNAME, MX, TXT, SRV, NS, SOA, CAA, PTR with security checks

Git Diff Parser — Parse unified git diff output — file list, additions/deletions, hunk breakdown, stats, structured JSON

Git Diff Parser

Parse unified git diff output — file list, additions/deletions, hunk breakdown, stats, structured JSON