All categories

10 categories, 116 tools. Open a category to see everything in it, or use the search box if you already know the name.

Text

Case conversion, dedupe, sorting, line cleanup, diffs

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Capitalize Text

Capitalize the first letter of words or sentences

Case Converter

UPPER, lower, Title, camel, snake and more

Character Counter

Count characters, words and lines

Text Diff

Compare two versions of a text

Lorem Ipsum Generator

Placeholder text by paragraph, words or list

Markdown to HTML

Convert Markdown source into HTML

Remove Duplicate Lines

Deduplicate lines, keeping the first hit

Remove Empty Lines

Delete blank lines from text

Lottery

Random number picks for SSQ, DLT, FC3D and PL3

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DLT Random Number Picker

Generate random 大乐透 tickets for the front and back zones

FC3D Random Number Picker

Generate random 福彩 3D three-digit numbers

PL3 Random Number Picker

Generate random 排列 3 three-digit numbers

SSQ Random Number Picker

Generate random 双色球 tickets, several at a time

Money & Finance

RMB amounts in formal uppercase, Chinese reading of numbers

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Chinese Number Reading

Read a number the way it is spoken in Chinese

Finance Uppercase Converter

Convert numbers to finance-style uppercase in both Simplified and Traditional Chinese

RMB Amount in Uppercase

Convert a numeric amount into formal Chinese RMB uppercase

Everyday Math

Percentages and other quick everyday calculations

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Percentage Calculator

Share of a total, percentage change, and value from a percentage

Developer

Encoding, hashing, JWT, regex, timestamps, cron

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Base64 Decode

Decode Base64 back into readable text

Base64 Encode

Encode text into a Base64 string

Base64 to File

Turn Base64 content back into a downloadable file

CIDR Calculator

Network address, mask and host count from a CIDR block

Color Converter

Convert colors between HEX, RGB and HSL, check contrast

Cron Generator

Build a cron expression without memorising the syntax

Cron Parser

Explain what a cron expression actually means

CSS Formatter

Expand minified CSS into indented rules

JSON / Data

Format, validate and compare JSON; convert data formats

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CSV to JSON

Convert CSV rows into a JSON array

JSON Diff

Compare two JSON documents

JSON Escape

Escape a string for embedding in JSON

JSON Flatten

Turn nested JSON into flat keys

JSON Formatter

Format, validate and minify JSON

JSON Minifier

Strip every space and newline from JSON

JSONPath Extract

Pull values out of JSON with JSONPath

JSON Sort Keys

Sort object keys alphabetically

Images

Compress, resize, crop, convert, watermark, QR codes

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Base64 to Image

Turn a Base64 string into a viewable image

Image Compressor

Shrink images and compare the result side by side

Batch Image Compressor

Compress many images at once, per-file status

Image Crop

Crop an image to the area you need

Flip Image Horizontally

Mirror an image left to right

Flip Image Vertically

Mirror an image top to bottom

Image Format Converter

PNG, JPEG and WebP with a live size comparison

Barcode Generator

Turn text or numbers into a barcode image

Web / SEO

Title and description checks, robots.txt, sitemap, schema

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Meta Description Length

Check description length for search results

Heading Structure Check

Check H1–H6 order for SEO

Open Graph Generator

Generate Open Graph tags

Robots.txt Checker

Inspect a robots.txt file

robots.txt Generator

Build a robots.txt file

Schema.org Generator

Generate JSON-LD structured data

SERP Preview

Preview how a result looks in search

Sitemap Checker

Inspect a sitemap.xml

YAML / Config

Validate YAML, format it, convert to JSON / XML

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XML to YAML

Convert XML into YAML

YAML Minifier

Compact YAML without breaking structure

YAML to JSON

Convert YAML into JSON

YAML to XML

Convert YAML into XML

YAML Validator

Check YAML syntax

Hardware

Dead pixels, keyboard, mouse, mic, gamepad, refresh rate

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Dead Pixel Test

Full-screen colors to spot dead or stuck pixels

Gamepad Test

Check buttons, sticks and triggers

Keyboard Test

See which keys actually register

Microphone Test

Check your mic level in real time

Mouse Test

Buttons, wheel and pointer position

Refresh Rate Test

Estimate your display's real refresh rate