Playground Sunshine ☀️

Fast, free, privacy-friendly tools for developers. Everything runs in your browser.

Formatters

JSON Formatter

Format, validate, and minify JSON directly in your browser.

YAML Formatter

Validate and format YAML with consistent 2-space indentation directly in your browser.

.env Formatter

Format, convert, and compare .env files. Export to JSON, Docker Compose, or GitHub Actions YAML. Generate .env.example in one click.

SQL Formatter

Beautify SQL queries with consistent indentation and keyword casing. Supports MySQL, PostgreSQL, SQLite, and T-SQL.

Markdown Previewer

Preview Markdown as formatted HTML in real time. Copy the rendered HTML or raw Markdown — runs entirely in your browser.

Encoders & Decoders

HTML Entity Encoder / Decoder

Encode special characters to HTML entities or decode them back to plain text — directly in your browser.

Number Base Converter

Convert numbers between binary, octal, decimal, and hexadecimal in real time — directly in your browser.

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 back to plain text directly in your browser.

URL Encoder / Decoder

Encode or decode percent-encoded URLs directly in your browser.

JWT Decoder

Decode a JWT token and inspect its header and payload without sending it anywhere.

Generators

UUID / NanoID Generator

Generate UUID v4 and NanoID values instantly in your browser.

Password Generator

Generate strong, random passwords with configurable length and character sets — using your browser’s secure crypto API.

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files directly in your browser.

Fake Data Generator

Generate realistic fake names, emails, addresses, and more for mocks and tests — directly in your browser.

QR Code Generator

Turn any text or URL into a scannable QR code. Download as PNG — runs entirely in your browser.

Date & Time

Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa.

Cron Expression Builder

Build and validate cron expressions with a visual UI and live run preview.

Text & Code

Regex Tester

Test regular expressions against sample text and visualise matches in your browser.

Text Diff Checker

Compare two blocks of text and see the differences highlighted line by line. Works with code, JSON, SQL, Markdown, or any plain text.

String Case Converter

Convert text between camelCase, PascalCase, snake_case, kebab-case, SCREAMING_SNAKE_CASE, and Title Case instantly.

Word & Character Counter

Count words, characters, sentences, paragraphs, and reading time for any block of text — live as you type.

CSV ↔ JSON Converter

Convert CSV to JSON or JSON to CSV directly in your browser. Handles quoted fields, commas inside values, and complex structures.

Images

Image Compressor / Resizer

Compress and resize JPEG, PNG, and WebP images in your browser. See before/after file size — no server upload.

Colors

Color Picker & Converter

Convert colors between HEX, RGB, HSL, and HSB instantly. Pick a color visually and see all formats update in real time.

Contrast Checker

Check WCAG AA and AAA color contrast ratios for any foreground and background color pair. Build accessible UIs.