go-supertools
Categories · 88 tools

Developer & Data Tools

Format, convert, encode and debug code and data: JSON, YAML, CSV, XML, Base64, JWT, regex, cron and more. Nothing you paste is uploaded.

JSON & data formats

26

CSV to JSON

Convert CSV or TSV with a header row into a JSON array of objects.

jq Playground

Run jq filters on JSON in your browser: the real jq engine, with examples, flags and a time limit.

JSON Beautifier

Beautify minified JSON with 2 or 4 space indentation and see the parser error if it is invalid.

JSON Diff

Compare two JSON documents and list every added, removed and changed value by path.

JSON Schema Generator

Generate a JSON Schema from a sample JSON document.

JSON Schema Validator

Check JSON against a JSON Schema (draft 4, 7, 2019-09 or 2020-12) and see every problem with its location.

JSON to CSV

Convert a JSON array of objects into CSV or TSV.

JSON to Go Struct Converter

Generate Go structs with json tags from sample JSON.

JSON to PHP Class Converter

Generate PHP 8 classes with typed properties from sample JSON.

JSON to Python Dataclass Converter

Generate Python dataclasses, Pydantic models or TypedDicts from sample JSON.

JSON to TOML Converter

Convert a JSON object to TOML in your browser.

JSON to TSV

Convert JSON data to TSV format instantly.

JSON to TypeScript

Generate TypeScript interfaces or types from a sample JSON document.

JSON to XML

It helps to convert your JSON data to XML format.

JSON to YAML

Convert JSON to YAML in your browser.

JSON to Zod Schema Converter

Generate Zod schemas and TypeScript types from sample JSON.

JSON Tree Viewer

Explore JSON as a collapsible tree: types, sizes, search, and copyable paths in JavaScript, jq or JSONPath form.

JSON Validator

Check whether text is valid JSON and see the parser error if it is not.

JSONPath Tester

Test JSONPath queries against your JSON and see the matching values or their paths.

SQL on CSV: Query CSV Files with SQL

Load CSV or TSV files as tables and query them with real SQL (SQLite) in your browser.

TOML to JSON Converter

Convert TOML to JSON in your browser.

TOML to YAML Converter

Convert TOML to YAML in your browser.

TSV to JSON

Convert TSV data to JSON format instantly.

XML to JSON

Convert XML into a JSON structure in your browser.

YAML to JSON

Convert YAML to JSON in your browser.

YAML to TOML Converter

Convert YAML to TOML in your browser.

Encode & decode

19

Base32 Encoder & Decoder

Encode text to Base32 or decode Base32, with the standard or extended-hex alphabet.

Base58 Encoder & Decoder

Encode text to Base58 (Bitcoin alphabet) or decode it.

Base64 to Text

Convert Base64 To Text

Base85 Encoder & Decoder

Encode text to Ascii85 or RFC 1924 Base85, or decode them.

Binary to Text

Convert Binary to Text

Decode Quoted Printable

Decode Quoted-Printable text, as used in email, into readable UTF-8.

Encode Quoted Printable

Encode text as Quoted-Printable with UTF-8 =XX hex codes.

Hex Dump Viewer

Show text as a hex dump in hexdump -C or xxd format, or turn hex and dumps back into text.

HTML Entity Decode

Decode HTML entities (numeric and the common named ones) back into plain characters.

HTML Entity Encode

Encode &, <, >, and quotes as HTML entities.

Number Base Converter

Convert numbers between binary, octal, decimal, hex and bases up to 36, with two's complement.

Punycode to Unicode

Convert Punycode to Unicode

ROT13 Decoder

Decode ROT13 text (a fixed 13-letter shift).

ROT13 Encoder

Encode text with ROT13 (a fixed 13-letter shift).

Text to Base64

Convert Text to Base64

Text to Binary

Convert Text to Binary

Unicode to Punycode

Convert Unicode to Punycode

URL Decoder

Decode your URLs

URL Encoder

Encode your URLs

Format & minify

12

CSS clamp() Generator

Generate a fluid font size or spacing value with CSS clamp() from two sizes and two screen widths.

CSS Formatter

Format and indent CSS so it is easy to read.

CSS Gradient Generator

Build linear, radial or conic CSS gradients with a live preview and copy the code.

CSS Minifier

Minify CSS Code

HTML Formatter

Format and indent HTML so it is easy to read.

HTML Minifier

Minify HTML Code

HTML to Markdown

Convert HTML into Markdown.

JS Formatter

Format and indent JavaScript so it is easy to read.

JS Minifier

Minify JavaScript in your browser with Terser, with before/after byte sizes, percent saved and clear syntax errors.

Markdown Editor with Live Preview

Write Markdown with a live preview, formatting buttons, HTML export and print to PDF, in your browser.

Markdown to HTML

Convert Markdown into HTML you can paste into a page.

SQL Beautifier

Format SQL queries with clean indentation and optional uppercase keywords.

Utilities

30

Prettier Formatter Online

Format TypeScript, JavaScript, JSON, YAML, Markdown, GraphQL, CSS, SCSS, Less and HTML with Prettier.

Mock Data Generator

Generate test data from a list of fields: names, emails, dates, numbers and more, as JSON, CSV or SQL.

HTML to JSX Converter

Turn HTML into JSX for React: className, htmlFor, style objects, self-closing tags and fragments.

SVG to JSX / React Component

Convert SVG markup into a React component: camelCase attributes, style objects and props spread on the svg.

CSS Box Shadow Generator

Design layered CSS box shadows with a live preview and copy the CSS or Tailwind class.

Semver Range Tester

Test versions against npm-style semver ranges like ^1.2.0, ~1.4 or >=2 <3.

MIME Type Lookup

Find the MIME type of a file extension, or the extensions of a media type.

.gitignore Generator

Combine .gitignore templates for your languages, frameworks and editors, from the GitHub collection.

Mermaid Diagram Editor

Write Mermaid text and see flowcharts, sequence diagrams and more as you type; export SVG or PNG.

Code to Image: Syntax Highlighter

Turn a code snippet into a shareable picture with syntax highlighting, themes and a window frame; download PNG or SVG.

cURL to Code Converter

Turn a curl command into fetch, axios, Python requests or PHP code.

Docker Run to Compose Converter

Convert a docker run command into a docker-compose.yml service.

Color Palette Generator

Generate an 11-step color scale and matching harmony colors from one base color.

Color Converter

Convert colors between HEX, RGB, HSL, HSV, CMYK, OKLab and OKLCH.

Markdown Table Generator

Turn CSV or spreadsheet data into a Markdown table, or turn a Markdown table into CSV, JSON or HTML.

SQL INSERT Generator

Turn CSV or JSON into CREATE TABLE and INSERT statements for PostgreSQL, MySQL, SQLite or SQL Server.

.env File Converter

Convert .env files to JSON, YAML, docker-compose environment blocks or shell export lines, and back.

HTTP Status Code Reference

Look up any HTTP status code: its meaning, when to use it, and the standard it comes from.

JWT Decoder, Verifier & Signer

Decode a JSON Web Token, verify its signature, or create and sign your own, all in your browser.

Regex Tester

Test your Regular Expressions

grep & ripgrep Recipe Builder

Build grep and ripgrep commands for log triage: find text, extract IPs or emails, rank values, failed SSH logins, HTTP errors.

Cron Generator

Create your Cron Jobs easily.

Cron Expression Explainer

Explain a cron expression in plain English and list its next run times.

Timestamp Converter

Convert UNIX Timestamps

Hex to RGB

Convert Hex to RGB Colors

RGB to Hex

Convert RGB to Hex Colors

WCAG Color Contrast Checker

Check the contrast ratio between text and background colours against WCAG AA and AAA.

chmod Calculator

Convert Unix file permissions between checkboxes, octal (755) and symbolic (rwxr-xr-x).

Email Extractor

Extract email addresses from any text instantly.

Source Code Downloader

Fetch the raw HTML source of a public web page through our server.

More

1

Basic Auth Header Generator

Build an HTTP Authorization: Basic header from a user name and password, with curl and fetch examples.

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