Savvy Goose
Character Counter Text & Writing
Case Converter Text & Writing
Diff Viewer Text & Writing
Markdown Converter Text & Writing
Percentage Calculator Numbers & Time
Unit Converter Numbers & Time
Timestamp Converter Numbers & Time
Time Between Dates Numbers & Time
Barcode Generator Generators
QR Code Generator Generators
Base64 Encoder Data & Encoding
URL Encoder Data & Encoding
JWT Decoder Data & Encoding
Hash Generator Data & Encoding
Color Converter Data & Encoding
JSON Formatter Data & Encoding
Format Converter Data & Encoding
Regex Tester Data & Encoding
Browser Info Data & Encoding
Password Generator Generators
Passphrase Generator Generators
UUID Generator Generators
Image Resizer Generators
Slug Generator Generators
Lorem Ipsum Generators
Mermaid Editor Diagrams
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Savvy Goose

26 tools · no sign-up

Helpful tools, free forever.

A small, growing collection of utilities. They run in your browser, ask for nothing, and never see your data.

Text & Writing

Character Counter
Count characters & words.
Case Converter
camelCase, snake_case, kebab-case & more.
Diff Viewer
Compare two pieces of text.
Markdown Converter
Convert between Markdown & HTML.

Data & Encoding

Base64 Encoder
Encode & decode Base64 for text or files.
URL Encoder
Percent-encode & decode URL components.
JWT Decoder
Inspect a JWT: header, payload, expiry.
Hash Generator
MD5, SHA-1, SHA-256 & SHA-512 for text or file.
Color Converter
HEX ↔ RGB ↔ HSL with a contrast checker.
JSON Formatter
Pretty-print, minify, and validate JSON.
Format Converter
Convert between JSON, YAML, CSV & XML.
Regex Tester
Build and debug regular expressions.
Browser Info
Viewport, screen size, DPR, browser & OS.

Numbers & Time

Percentage Calculator
Common percentage calculations.
Unit Converter
Length, weight, temperature & data sizes.
Timestamp Converter
Unix epoch ↔ ISO ↔ human, with timezones.
Time Between Dates
Calendar days, business days & holidays between two dates.

Generators

Barcode Generator
Generate & print Code 128 barcodes.
QR Code Generator
Generate QR codes for URLs, text, and more.
Password Generator
Strong, random passwords with a strength meter.
Passphrase Generator
Memorable, random word-based passphrases.
UUID Generator
Generate v4 or v7 UUIDs in bulk.
Image Resizer
Resize, convert & build favicons in your browser.
Slug Generator
Turn any string into a URL slug.
Lorem Ipsum
Generate placeholder text.

Diagrams

Mermaid Editor
Write Mermaid, preview live, export SVG or PNG.

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