Developer Tools

52 Free Online Tools

JSON formatters, SQL beautifiers, Base64/URL encoders, Hash generators, JWT decoders, and Regex testers. Every tool is free, works offline in your browser, and requires no registration or software installation.

All Developer Tools (52)

JSON Formatter

Format, beautify, and inspect messy or minified JSON data with 2-space or 4-space indentation, syntax highlighting, and download option.

JSON Validator

Validate JSON syntax in real time, locate parsing errors with exact line and column numbers, and view detailed diagnostics.

JSON Minifier

Compress and minify JSON payloads by stripping whitespace, line breaks, and indentation to reduce payload transfer size.

SQL Formatter

Beautify and format messy SQL queries with standardized keyword capitalization, clause indentation, and clean line breaks.

SQL Query Validator

Check SQL queries for structural syntax errors, unclosed quotes, mismatched parentheses, and keyword sequencing mistakes.

Base64 Encoder

Convert plain text, strings, and UTF-8 characters into standard Base64 encoding with optional URL-safe mode.

Base64 Decoder

Decode Base64 encoded strings back into clean, readable plain text with UTF-8 character support and error detection.

URL Encoder

Encode special characters, spaces, and parameters into percent-encoded strings for safe HTTP URLs and query strings.

URL Decoder

Decode percent-encoded (%20, %2F, %26, etc.) URLs and query string parameters back into clean readable text.

HTML Encoder

Convert special HTML characters (&, <, >, ", ') into secure HTML entities to prevent XSS vulnerabilities and render issues.

HTML Decoder

Convert escaped HTML entities (&, <, >, ") back into standard raw HTML tags and plain characters.

Regex Tester

Test regular expressions in real time with syntax highlighting, flag toggles (g, i, m, s), capture group breakdowns, and quick cheatsheet.

UUID Generator

Generate cryptographically secure RFC 4122 Version 4 UUIDs (Universally Unique Identifiers) in bulk with case and hyphen controls.

Password Generator

Generate secure, randomized passwords with custom length, symbols, numbers, character exclusion, and entropy strength meter.

Hash Generator

Generate cryptographic message digests in SHA-256, SHA-512, SHA-1, and MD5 using native Web Crypto APIs.

Timestamp Converter

Convert human-readable dates to Unix timestamps (seconds and milliseconds) and timestamps back to ISO 8601, UTC, and local date formats.

Unix Timestamp Converter

Live ticking Unix epoch clock with one-click timestamp copy, date format generator, and epoch time math.

JWT Decoder

Decode and inspect JSON Web Tokens (JWT) into Header and Payload JSON without transmitting your token over the internet.

Color Converter

Convert color codes between HEX, RGB, HSL, and CMYK formats with interactive color picker and palette preview.

CSS Minifier

Minify and optimize CSS styles by stripping comments, consolidating selectors, and removing whitespace to speed up stylesheet downloads.

SHA-256 Hash

Encode, decode, hash, and format strings with SHA-256 Hash in your browser privately.

SHA-512 Hash

Encode, decode, hash, and format strings with SHA-512 Hash in your browser privately.

SHA-384 Hash

Encode, decode, hash, and format strings with SHA-384 Hash in your browser privately.

SHA-1 Hash

Encode, decode, hash, and format strings with SHA-1 Hash in your browser privately.

MD5 Hash

Encode, decode, hash, and format strings with MD5 Hash in your browser privately.

Base64 Text Encoder

Encode, decode, hash, and format strings with Base64 Text Encoder in your browser privately.

Base64 Text Decoder

Encode, decode, hash, and format strings with Base64 Text Decoder in your browser privately.

URL Percent Encoder

Encode, decode, hash, and format strings with URL Percent Encoder in your browser privately.

URL Percent Decoder

Encode, decode, hash, and format strings with URL Percent Decoder in your browser privately.

HTML Entity Encoder

Encode, decode, hash, and format strings with HTML Entity Encoder in your browser privately.

HTML Entity Decoder

Encode, decode, hash, and format strings with HTML Entity Decoder in your browser privately.

ROT13 Cipher Obfuscator

Encode, decode, hash, and format strings with ROT13 Cipher Obfuscator in your browser privately.

Caesar Cipher

Encode, decode, hash, and format strings with Caesar Cipher in your browser privately.

Text to Binary Converter

Encode, decode, hash, and format strings with Text to Binary Converter in your browser privately.

Binary to Text Converter

Encode, decode, hash, and format strings with Binary to Text Converter in your browser privately.

Text to Hex Converter

Encode, decode, hash, and format strings with Text to Hex Converter in your browser privately.

Hex to Text Converter

Encode, decode, hash, and format strings with Hex to Text Converter in your browser privately.

Reverse String Tool

Encode, decode, hash, and format strings with Reverse String Tool in your browser privately.

Reverse Words Tool

Encode, decode, hash, and format strings with Reverse Words Tool in your browser privately.

UPPERCASE Text Tool

Encode, decode, hash, and format strings with UPPERCASE Text Tool in your browser privately.

lowercase Text Tool

Encode, decode, hash, and format strings with lowercase Text Tool in your browser privately.

Title Case Text Tool

Encode, decode, hash, and format strings with Title Case Text Tool in your browser privately.

camelCase Converter

Encode, decode, hash, and format strings with camelCase Converter in your browser privately.

kebab-case Converter

Encode, decode, hash, and format strings with kebab-case Converter in your browser privately.

snake_case Converter

Encode, decode, hash, and format strings with snake_case Converter in your browser privately.

CONSTANT_CASE Converter

Encode, decode, hash, and format strings with CONSTANT_CASE Converter in your browser privately.

dot.case Converter

Encode, decode, hash, and format strings with dot.case Converter in your browser privately.

path/case Converter

Encode, decode, hash, and format strings with path/case Converter in your browser privately.

Sentence Case Converter

Encode, decode, hash, and format strings with Sentence Case Converter in your browser privately.

Zalgo Glitch Text Generator

Encode, decode, hash, and format strings with Zalgo Glitch Text Generator in your browser privately.

Upside Down Text Generator

Encode, decode, hash, and format strings with Upside Down Text Generator in your browser privately.

Morse Code Audio & Text Generator

Encode, decode, hash, and format strings with Morse Code Audio & Text Generator in your browser privately.