All tools

Everything on the site in one place. Type to filter, or press Ctrl+K on any page to jump straight to a tool.

Format & validate

JSON & XML Formatter

Format, validate, repair and minify JSON or XML, with a tree view and code folding.

JSON Formatter

Beautify and validate JSON, and see the exact line of any syntax error.

JSON Validator

Check JSON syntax and see the exact line and column of every error.

JSON Viewer

Explore JSON as a collapsible tree with search, copy path and JSONPath.

JSON Minifier

Remove whitespace from JSON to make it smaller.

XML Formatter

Indent and validate XML, sort elements and fix broken tags.

SQL Formatter

Beautify SQL queries for MySQL, PostgreSQL, SQL Server, Oracle and more.

JSON Schema

Generate a schema from a sample, or validate JSON against a schema.

HTML, CSS & JS Beautifier

Beautify or minify HTML, CSS and JavaScript, and see how many bytes you save.

Markdown Editor

Write Markdown with a live preview, then export PDF, HTML or a README.md.

Convert

JSON to XML

Convert JSON into well-formed XML.

XML to JSON

Convert XML, including attributes and repeated elements, into JSON.

JSON to CSV

Turn a JSON array into an Excel-ready CSV file, with nested fields flattened.

YAML Converter

JSON to YAML, and application.properties to YAML and back.

CSV Converter

Turn CSV into JSON, XML or SQL INSERT statements.

TOML Converter

Convert JSON or XML into TOML.

Object Mapper

Generate Java, TypeScript, Python, C#, Go, Kotlin, Rust or Zod types from JSON.

Java toString() to JSON

Turn Lombok DTO, Kotlin data class or record toString() output into JSON.

cURL to Code

Turn a curl command into fetch, axios, Python, Java, Spring, Go, C# or PHP.

Timestamp Converter

Unix timestamps to dates and back, and times across time zones.

Number Base Converter

Binary, octal, decimal, hex and any base up to 36, with two's complement.

Inspect & debug

JSON & XML Compare

See every difference between two JSON or XML documents.

Text Diff

Compare any two texts or code files line by line, word by word or by character.

Regex Tester

Test regular expressions live, with groups, replace and a plain-English explanation.

JWT Decoder

Read a token's claims, check expiry and verify the signature.

Cron Expression Explainer

Understand cron schedules in plain English and see the next run times.

Encode / Decode

Base64, URL, HTML entities, JSON strings, hex and Unix timestamps.

Generate

Hash Generator

MD5, SHA-1, SHA-256, SHA-512 and HMAC for text or files.

UUID Generator

Generate UUID v4, UUID v7, ULID and Nano IDs in bulk.

Password Generator

Strong random passwords and passphrases, with a strength estimate.

QR Code Generator

QR codes for links, phone calls, WhatsApp, Wi-Fi and contact cards.

Mock Data Generator

Realistic fake JSON, CSV or SQL from a sample document or a JSON Schema.

Network & system

Subnet Calculator

CIDR ranges, masks, host counts and subnet splits for IPv4 and IPv6.

Chmod Calculator

Convert Unix permissions between 755, rwxr-xr-x and chmod commands.

Share Drop

Send text or a file to another device with a short-lived link.

Image & PDF tools

Convert images, merge and compress PDFs and browse SVG icons on ConvertFigure.

Learn

Short guides to JSON, XML, YAML and the formats around them.

One site for everyday developer chores

These tools cover the small jobs that interrupt real work: making an API response readable, turning JSON into a Java class, checking why a cron job didn't fire, decoding a token from a failing request, or generating a batch of test IDs. Each one opens instantly, needs no account and keeps working as you type.

Most tools run entirely in your browser, so the data you paste stays on your device. The few that need our server (the format converters, Object Mapper and Share Drop) process your data in memory and don't store it. See the privacy policy for details.