Developer Tools Online

Fast, free, privacy-friendly utilities for developers. Everything runs in your browser — your data never leaves your device.

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JSON Formatter

Format, validate and minify JSON data

🔤

Base64 Encoder/Decoder

Encode and decode Base64 strings

🔗

URL Encoder/Decoder

Encode and decode URL components

🆔

UUID Generator

Generate random UUID v4 identifiers

#️⃣

Hash Generator

Generate SHA-256, SHA-1, SHA-512 hashes

🕐

Unix Timestamp

Convert between Unix timestamps and dates

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Password Generator

Generate secure random passwords

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HTML Entities

Encode and decode HTML entities

JSON Formatter & Validator

Format, validate, minify and prettify JSON data.

Input JSON

Output

Base64 Encoder / Decoder

Encode text to Base64 or decode Base64 to text.

Input

Output

URL Encoder / Decoder

Encode or decode URL components and query strings.

Input

Output

UUID Generator

Generate cryptographically random UUID v4 identifiers.

Count:

Hash Generator

Generate cryptographic hashes using Web Crypto API.

Input Text

SHA-256 SHA-1 SHA-512

Output

Unix Timestamp Converter

Convert between Unix timestamps and human-readable dates.

Current Time

Unix Timestamp → Date

Date → Unix Timestamp

Password Generator

Generate secure random passwords with customizable options.

Length: Uppercase Lowercase Digits Symbols

HTML Entity Encoder / Decoder

Encode special characters to HTML entities or decode them back.

Input

Output