Browse all tools

Fast, private tools for developers

Useful browser-based utilities for code, data, text and web workflows. No upload required.

18focused tools

Local processingRuns in your browser

Private by designYour input stays in this browser.

Browse all tools

18 tools shown

Format & convert

JSON Formatter & Validator

Format, validate and inspect JSON directly in your browser.

Format & convert

JSON to CSV Converter

Turn an array of JSON objects into a spreadsheet-friendly CSV file.

Format & convert

CSV to JSON Converter

Convert comma-separated data into an array of JSON objects.

Encode & decode

JWT Decoder

Inspect the header and payload of a JSON Web Token without sending it anywhere.

Encode & decode

Base64 Encoder & Decoder

Encode text to Base64 or decode Base64 back to UTF-8 text.

Encode & decode

URL Encoder & Decoder

Safely encode query text or decode percent-encoded URLs.

Encode & decode

UUID Generator

Generate random UUID v4 identifiers in your browser.

Time & scheduling

Unix Timestamp Converter

Convert Unix seconds or milliseconds to an ISO date and local time.

Text & testing

Regex Tester

Test a JavaScript regular expression against sample text locally.

Time & scheduling

Cron Expression Explainer

Read the five fields of a standard minute-hour-day-month-week cron expression.

Text & testing

Text Diff Checker

Compare two text blocks line by line in your browser.

Format & convert

SQL Formatter

Add readable line breaks and indentation to common SQL queries.

Encode & decode

Text Hash Fingerprint

Create a fast FNV-1a fingerprint for comparing text samples.

Web utilities

Color Converter

Convert a hex color into RGB, HSL and CSS variable formats.

Encode & decode

HTML Entity Encoder & Decoder

Escape special characters for HTML or decode common entities back to text.

Text & testing

Password Generator

Generate random passwords locally with adjustable length and symbols.

Web utilities

User-Agent Parser

Extract browser, operating system and device hints from a User-Agent string.

Encode & decode

Number Base Converter

Convert binary, octal, decimal and hexadecimal values for coding workflows.

No matching tools.