Tool catalog

The utility you need, without the noise

Search and filter the approved catalog. Tool processing is added only after each implementation passes its dedicated tests.

Encoding

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 locally.

In-browser Open

Web

Color Converter

Convert colors between HEX, RGB, and HSL.

In-browser Open

Date Time

Cron Expression Parser

Parse cron expressions into plain English and preview upcoming run times.

In-browser Open

Security

Hash Generator

Generate MD5, SHA-1, SHA-256, and SHA-512 hashes locally in your browser.

In-browser Open

Encoding

HTML Entity Encoder / Decoder

Encode or decode HTML entities locally.

In-browser Open

Json

JSON Diff

Compare two JSON documents and inspect their differences.

In-browser Open

Json

JSON Formatter

Format and beautify JSON locally in your browser.

In-browser Open

Json

JSON Minifier

Remove unnecessary whitespace from JSON locally.

In-browser Open

Json

JSON Validator

Validate JSON and locate useful syntax errors.

In-browser Open

Security

JWT Decoder

Decode JWT headers and payloads without verifying signatures.

In-browser Open

Security

JWT Generator

Sign JSON payloads as HS256 JWTs locally in your browser.

In-browser Open

Generators

Lorem Ipsum Generator

Generate placeholder text by word, sentence, or paragraph count.

In-browser Open

Text

Regex Tester

Test regular expressions against text and inspect matches.

In-browser Open

Web

Responsive Preview

Preview embeddable sites at common viewport dimensions.

In-browser Open

Api

REST API Tester

Build bounded HTTP requests and inspect safe response previews.

Server-side Open

Text

SQL Formatter

Format and beautify SQL queries locally in your browser.

In-browser Open

Web

Tech Stack Detector

Identify the technologies powering any public website from its HTTP headers and HTML.

Server-side Open

Text

Text / Code Diff

Compare text or code and review the differences.

In-browser Open

Date Time

Unix Timestamp Converter

Convert Unix timestamps and human-readable dates.

In-browser Open

Encoding

URL Encoder / Decoder

Encode or decode URL components locally.

In-browser Open

Generators

UUID Generator

Generate UUID values locally in your browser.

In-browser Open

Web

Website Diagnostics

Inspect status, response timing, redirects, DNS, and SSL metadata.

Server-side Open