toolpack.dev

Developer tools that run in your browser.

Your input never leaves your browser. No uploads, no sign-up, works offline.

Popular: JSON Formatter · JWT Decoder · Base64 Encoder / Decoder · UUID / GUID Generator · Regex Tester

Encoding & Decoding

Base64, URL, HTML entities, JWT and other wire formats.

B64 Base64 Encoder / Decoder Encode and decode Base64 text and files, entirely in your browser &#; HTML Entity Encoder / Decoder Escape and unescape HTML entities so markup renders as text JWT JWT Decoder Decode and inspect JSON Web Tokens without sending them anywhere URL URL Encoder / Decoder Percent-encode and decode URLs, with component and full-URI modes

JSON & Data

Format, validate and convert structured data.

{ } JSON Formatter Beautify, minify and validate JSON with the error position shown YML JSON ↔ YAML Converter Convert JSON to YAML and back, with reserved words quoted correctly

Text

Clean, compare, transform and count text.

Aa Case Converter Convert between camelCase, snake_case, kebab-case and eight more LIP Lorem Ipsum Generator Generate placeholder paragraphs, sentences or words, optionally wrapped in HTML ¶ Remove Line Breaks Join wrapped lines into one block while keeping paragraph breaks SLG Slugify Turn any title into a clean URL slug, with proper Turkish handling

Time & Date

Timestamps, cron expressions and time zones.

CRN Cron Expression Parser Explain a cron expression in plain English and list the next runs UTC Unix Timestamp Converter Convert timestamps to dates and back, with the unit detected for you

Security & Crypto

Hashes, identifiers and passwords — generated locally.

# Hash Generator Compute MD5, SHA-1, SHA-256, SHA-384 and SHA-512 in your browser PWD Password Generator Generate strong passwords locally, with real entropy shown UID UUID / GUID Generator Generate v4 and time-ordered v7 UUIDs in every .NET format

Web & Network

URLs, regular expressions and HTTP references.

.* Regex Tester Test a regular expression, see every match and get the pattern explained

Color, Image & Design

Colors, contrast, images and QR codes.

QR QR Code Generator Generate a QR code as clean SVG or PNG, entirely in your browser

.NET & C#

Tools built for the .NET ecosystem specifically.

C# JSON to C# Class Generate C# records or classes from JSON, with System.Text.Json attributes

Code

Format, minify and compare source code.

SQL SQL Formatter Format a one-line query into something readable, or collapse it back