Formatter

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Paste it in.Read it out.

A hundred and twenty-five small tools for the messy middle of a working day — the malformed JSON, the base64 blob, the timestamp nobody can read. Every one of them runs here, in this browser.

⌘K

The ledger

125

tools

Eighteen shelves

Each category is a plate — cyan, magenta, yellow or black — so a tool’s home is legible at a glance, in the index, in the rail and in your history.

JSON11

Format, validate, view, diff and query JSON.

JSON Formatter JSON Validator JSON Minifier

Encoding10

Base64, URL, HTML entities, JWT.

Base64 Encode Base64 Decode Base64 Image

Binary & Numbers9

Bits, hex, bases, epochs, string stats.

Binary to Text Text to Binary Hex to Text

Converters13

JSON, YAML, XML, CSV, TOML, SQL, cURL.

JSON to CSV CSV to JSON JSON to YAML

Validators4

Schemas and syntax checks.

Schema Validator CSV Validator YAML Validator

XML4

Format, view, edit, XPath.

XML Formatter XML Viewer XML Editor

Formatters & Text12

CSS, HTML, JS, SQL, stack traces, text.

CSS Formatter HTML Formatter JS Formatter

SQL & Data7

CSV grids, SQL, DuckDB, Parquet.

Data Explorer CSV Viewer Query CSV

Security7

Hashes, passwords, tokens, headers.

Hash Generator HMAC Password Generator

Regex & API6

Regex labs, GraphQL, API and MCP mocks.

Regex Tester Regex Flavours GraphQL Playground

Languages5

Wasm playgrounds, client-only lite mode.

Python JavaScript Go

Visual & Canvas4

3D, canvas, whiteboard.

OpenSCAD Three.js Canvas

Diagrams3

Graphviz, Mermaid and PlantUML, rendered locally.

Graphviz Mermaid PlantUML

Generators & DevOps13

QR, UUID, mock data, CLI builders.

QR Generator Lorem Ipsum Random JSON

Image, Colour & SEO6

SVG, colours, images, SEO.

SVG Preview Colour Picker Contrast Checker

ASCII6

ASCII art, boxes, trees.

ASCII Draw Box Drawing Banner Comments

Time2

Timers, epochs, timezones.

Stopwatch & Timers Timezone Compare

Platform3

Pipelines, workspaces, recipes.

Pipelines Workspaces Recipes

Nothing is sent anywhere

There is no server to receive your input. Formatting, hashing, parsing and diffing happen in the page. Share links encode the payload in the URL fragment, which browsers never transmit. History and favourites sit in this browser’s local storage and can be wiped in one click from Settings.

History that remembers the runEvery execution is logged with its input, output and options. Restore one and the workbench comes back exactly as it was.

Favourites pinned to the railStar the six you actually use. They sit above everything else, next to what you touched most recently.

Pipelines for the two-step jobsDecode, then pretty-print, then hash. Chain tools and keep the chain.