Base64

Encode or decode Base64 text and files instantly in your browser.

Encoding

URL Encode / Decode

Percent-encode or decode URLs and query string components.

Encoding

HTML Entities

Encode special characters to HTML entities and decode them back.

Encoding

Hash Generator

Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes client-side.

Hashing

JWT Decoder

Inspect header, payload and signature of any JSON Web Token.

PKI

Certificate Decoder

Paste a PEM certificate and inspect subject, issuer, SANs and validity.

PKI

JSON Formatter

Prettify, minify and validate JSON. Highlights errors on invalid input.

Text

Regex Tester

Write a pattern, test against live input, and see all matches highlighted.

Text

Text Diff

Compare two blocks of text and see additions, deletions and changes.

Text

Word Counter

Count characters, words, sentences and paragraphs as you type.

Text

XPath Tester

Evaluate XPath expressions against an XML document and highlight matches.

Text

Color Converter

Convert between HEX, RGB, HSL and HSB with a live color preview.

Conversion

Unix Timestamp

Convert between Unix timestamps and human-readable dates in any timezone.

Conversion

Number Base Converter

Convert integers between binary, octal, decimal and hexadecimal.

Conversion

CRON Parser

Explain a CRON expression in plain English and preview next run times.

Conversion

UUID Generator

Generate RFC 4122 v4 UUIDs in bulk — copy one or the whole list.

Generation

Password Generator

Create strong random passwords with configurable length and character sets.

Generation

QR Code Generator

Turn any URL or text into a downloadable QR code, no server needed.

Generation

Periodic Table

Interactive 118-element periodic table with detail panels, category filters, and property visualizations.

Science

Image to ASCII

Convert any image to ASCII art with adjustable width, character sets, color mode, and text export.

Generation

ASCII Table

Full ASCII and Latin-1 table with decimal, hex, octal, binary and descriptions.

Reference

Emoji Finder

Search the full Unicode emoji set by name, copy emoji or code point.

Reference

Image Converter

Convert images between PNG, JPEG, WebP and BMP with optional resize — fully client-side.

Generation

Spirograph

Draw hypotrochoids and epitrochoids with adjustable radii, rainbow mode, animation, and PDF export.

Fun

Wheel of Fortune

Spin a customizable wheel to make random decisions from your own list of options.

Fun

Fractal Explorer

Explore Mandelbrot, Julia, Burning Ship, Newton, Barnsley Fern and more. Zoom, pan, tweak parameters, export PNG.

Fun

Markdown Preview

Live split-pane editor with LaTeX math, syntax-highlighted code, and auto-save.

Writing

White Noise Generator

Generate white, pink or brown noise with pitch and frequency controls. Download as MP3.

Audio

Ketsu

Describe any game and watch AI build it for you instantly.

AI

Brawl Stats

Look up player stats, live event rotation with tier lists, and rankings.

Games

FairShare

Share expenses with friends — groups, receipts, weighted splits, settle up.

Finance

Mortgage Calculator

Compute monthly payments and full amortization schedule for any loan.

Finance