ToolNest

Developer Tools

Format, encode, convert, and clean data — 100% private, no sign up.

JSON Formatter & Validator

Format messy JSON and catch syntax errors.

Base64 Encoder / Decoder

Encode or decode Base64 strings.

URL Encoder / Decoder

Percent-encode or decode a URL.

HEX to RGB Converter

Switch between HEX and RGB color codes.

CSS Minifier

Compress CSS by stripping whitespace.

Unix Timestamp Converter

Convert epoch time to a readable date.

HTML Beautifier

Add proper indentation to messy HTML.

JSON to CSV Converter

Convert a JSON array into a CSV.

Markdown Previewer

See your Markdown rendered live.

Case Shifter

Convert between naming conventions.

Password Strength Tester

Check password strength, 100% private.

Hash Generator

Generate a SHA-256 or SHA-1 hash.

CSV Data Cleaner

Trim, dedupe, and clean CSV data.