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54 tools live · all free

Every tool a developer
ends up Googling.

Hashes, UUIDs, colors, fake data, regex, images and more. Open source, and everything runs in your browser.

JSON{ "ok": true }devdrawerOpen →Color#6366F1devdrawerOpen →UUID v70192e4c1-7b3adevdrawerOpen →SHA-2569f86d081 884c7d65devdrawerOpen →Passwordx7#Kq!9vL$devdrawerOpen →
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Text

Count it, case it, diff it, clean it.

1,284 words

Word Counter

Words, characters, sentences, reading time.

{}FreeText
camelCase

Text Case Converter

camelCase, snake_case, kebab-case, Title Case and more.

{}FreeText
+ added − removed

Text Difference Checker

Line-by-line diff of two texts.

{}FreeText
Lorem ipsum dolor…

Lorem Ipsum Generator

Placeholder paragraphs, sentences or words.

{}FreeText
my-blog-post

Slug Generator

Turn any title into a URL-safe slug.

{}FreeText
a b c

Line Sorter & Deduper

Sort, reverse, shuffle, dedupe and trim lines.

{}FreeText
foo → bar

Find & Replace

Bulk find and replace, with regex support.

{}FreeText
# Heading

Markdown Preview

Live markdown to HTML preview.

{}FreeText
▶ ﹏﹏﹏

Text to Speech

Read text aloud using the browser voice.

{}FreeText

Generators

IDs, passwords and realistic fake data on demand.

f47ac10b-58cc

UUID Generator

UUID v4, v7 and nanoid, in bulk.

{}FreeGenerators
x7#Kq!9vL$

Password Generator

Strong random passwords with strength meter.

{}FreeGenerators
Ada Lovelace

Fake Data Generator

Names, emails, addresses and more as JSON or CSV.

{}FreeGenerators
🎲 42

Random Number Generator

Random integers in a range, dice, coin flips.

{}FreeGenerators
▚▞▚▞

QR Code Generator

Make QR codes for links, Wi-Fi and text.

{}FreeGenerators
▌▍▌▌▍▌▍

Barcode Generator

EAN, UPC and Code128 barcodes.

{}FreeGenerators
node_modules/

.gitignore Generator

Pick stacks and get a .gitignore.

{}FreeGenerators

Crypto & Security

Hashes, signatures and tokens, decoded locally.

sha256:9f86d0…

Hash Generator

SHA-1, SHA-256, SHA-384, SHA-512 of text or files.

{}FreeCrypto & Security
hmac:5d41a…

HMAC Generator

HMAC-SHA signatures with a secret key.

{}FreeCrypto & Security
eyJhbGciOi…

JWT Decoder

Decode JWT header and payload, check expiry.

{}FreeCrypto & Security
$2b$10$…

Bcrypt Hash & Verify

Hash and verify bcrypt passwords.

{}FreeCrypto & Security
-----BEGIN-----

RSA Key Pair Generator

Generate PEM key pairs in the browser.

{}FreeCrypto & Security

Encoding

Base64, URLs, entities and number bases.

SGVsbG8=

Base64 Encoder / Decoder

Encode or decode Base64 (UTF-8 safe).

{}FreeEncoding
hello%20world

URL Encoder / Decoder

Percent-encode or decode strings and parse URLs.

{}FreeEncoding
<div>

HTML Entity Encoder

Escape and unescape HTML entities.

{}FreeEncoding
0xFF = 255

Number Base Converter

Binary, octal, decimal, hex.

{}FreeEncoding
data:image/png…

Image to Base64

Turn an image into a data URI.

{}FreeEncoding

Data & Code

Format, convert and test what you ship.

{ "ok": true }

JSON Formatter

Prettify, minify and validate JSON.

{}FreeData & Code
a,b,c

JSON ↔ CSV Converter

Convert between JSON arrays and CSV.

{}FreeData & Code
/^\d+$/g

Regex Tester

Test patterns with live match highlighting.

{}FreeData & Code
key: value

JSON ↔ YAML

Convert JSON and YAML.

{}FreeData & Code
SELECT *

SQL Formatter

Prettify SQL queries.

{}FreeData & Code
curl → fetch

cURL to Fetch

Convert curl commands to fetch / axios.

{}FreeData & Code
interface User

JSON to TypeScript

Generate TS interfaces from JSON.

{}FreeData & Code

Color & Design

Pick, check and extract colors.

#6366F1

Color Picker

Pick colors, eyedropper, HEX / RGB / HSL.

{}FreeColor & Design
AAA 7.2:1

Contrast Checker

WCAG contrast ratio for text and background.

{}FreeColor & Design
● ● ● ●

Image Palette Generator

Extract dominant colors from an image.

{}FreeColor & Design
linear-gradient

CSS Gradient Generator

Build linear gradients and copy the CSS.

{}FreeColor & Design
0 8px 24px

Box Shadow Generator

Design CSS box shadows visually.

{}FreeColor & Design

Image

Compress and crop without uploading anything.

2.4MB → 380KB

Image Compressor

Shrink JPG / PNG / WebP in the browser.

{}FreeImage
16 : 9

Image Cropper

Crop images by dragging a selection.

{}FreeImage
PNG → WebP

Image Format Converter

Convert between PNG, JPG and WebP.

{}FreeImage
32×32

Favicon Generator

All favicon sizes from one image.

{}FreeImage

Video & Audio

Trim clips and make GIFs, no upload.

00:12 — 00:48

Video Trimmer

Trim video clips in the browser.

{}FreeVideo & Audio
MP4 → GIF

Video to GIF

Convert short clips to GIFs.

{}FreeVideo & Audio

Time & Date

Timestamps, zones and schedules.

1793474400

Unix Timestamp Converter

Epoch seconds / ms ↔ human dates.

{}FreeTime & Date
*/5 * * * *

Cron Explainer

Explain cron expressions in plain English.

{}FreeTime & Date
UTC+1

Time Zone Converter

Convert times across time zones.

{}FreeTime & Date

Web & Network

Status codes, user agents and permissions.

418

HTTP Status Codes

Look up every HTTP status code.

{}FreeWeb & Network
Chrome / macOS

User Agent Parser

See browser, OS and device from a UA string.

{}FreeWeb & Network
rwxr-xr-x

Chmod Calculator

Unix permissions as numbers and symbols.

{}FreeWeb & Network
<meta og:…>

Meta Tag Generator

SEO and Open Graph tags.

{}FreeWeb & Network

Math & Units

Quick conversions and calculations.

1 mi = 1.609 km

Unit Converter

Length, weight, temperature, data and more.

{}FreeMath & Units
25%

Percentage Calculator

X% of Y, percent change and more.

{}FreeMath & Units
1920×1080

Aspect Ratio Calculator

Resize keeping the ratio.

{}FreeMath & Units