Free Developer Tools Online

Run practical developer workflows in your browser for payload validation, encoding/decoding, parsing, and formatter tasks.

Featured Developer Tools

Start with high-intent pages in this category, then use the full listing below for adjacent tasks.

JSON Formatter

Format and minify JSON payloads.

Regex Tester

Test regex patterns against input strings.

Base64 Encode / Decode

Encode plain text or decode Base64 payloads.

JWT Decoder

Decode JWT header and payload claims.

HTML Formatter

Format HTML markup with cleaner indentation.

JavaScript Formatter

Format JavaScript snippets quickly.

URL Parser

Parse URL components and query parameters.

JSON Validator

Validate JSON and inspect syntax errors.

All Developer Tools

JSON Formatter

Format and minify JSON payloads.

Regex Tester

Test regex patterns against input strings.

Base64 Encode / Decode

Encode plain text or decode Base64 payloads.

JWT Decoder

Decode JWT header and payload claims.

HTML Formatter

Format HTML markup with cleaner indentation.

JavaScript Formatter

Format JavaScript snippets quickly.

URL Parser

Parse URL components and query parameters.

JSON Validator

Validate JSON and inspect syntax errors.

ASCII to Text Converter

Convert ASCII numeric sequences back to readable text output.

Binary to Decimal Converter

Convert binary values into decimal output with signed and unsigned support.

Cron Expression Helper

Interpret cron syntax into plain language.

CSS Formatter

Format CSS styles for readability.

CSS Minifier

Minify CSS stylesheets quickly.

CSV to JSON Converter

Convert CSV rows to JSON output.

Date to Unix Timestamp

Convert date/time input into Unix timestamps.

Decimal to Binary Converter

Convert decimal integers into binary output.

Decimal to Hex Converter

Convert decimal integers into hexadecimal output.

Diff Checker

Compare two text blocks and highlight line differences.

Email Validator

Validate email syntax, parts, and common formatting errors.

Epoch to Date Converter

Convert epoch timestamps into UTC and local date values.

Hash Generator

Generate SHA hashes from text input.

HEX RGB HSL Color Converter

Convert colors between HEX, RGB, and HSL formats.

Hex to Decimal Converter

Convert hexadecimal values into decimal output.

HTML Minifier

Minify HTML markup by reducing whitespace.

HTML to Markdown

Convert basic HTML markup into Markdown output.

HTTP Header Parser

Parse raw HTTP headers into structured JSON.

JavaScript Minifier

Minify JavaScript snippets for compact output.

JSON Escape / Unescape

Escape and unescape JSON string content safely.

JSON Minifier

Minify JSON payloads for compact transport.

JSON Schema Validator

Validate JSON documents against JSON Schema definitions.

JSON to CSV Converter

Convert JSON arrays of objects to CSV.

JSON to XML Converter

Convert JSON objects to XML markup output.

JWT Generator

Generate unsigned JWT tokens from JSON header and payload.

Markdown Preview

Preview rendered HTML from Markdown input.

Markdown to HTML

Convert Markdown text into HTML output.

SQL Formatter

Format SQL queries for cleaner reading.

SQL Minifier

Minify SQL statements to compact single-line output.

Text to ASCII Converter

Convert plain text into ASCII code points with decimal and hex views.

Unix Timestamp Converter

Convert epoch seconds/ms and datetime values with timezone-aware display...

URL Encode / Decode

Encode or decode URL components.

UUID v4 Generator

Generate random UUID version 4 values.

UUID v7 Generator

Generate time-ordered UUID version 7 values.

XML Formatter

Format raw XML into clean indented output.

XML to JSON Converter

Convert XML nodes into JSON output.

FAQ

Are developer tools safe to use with sensitive data?

Yes. Tools like JSON Formatter and Regex Tester run locally in your browser.

Do I need to install anything?

No. All tools work directly in your browser.

Which tool should I use to validate JSON?

Use the JSON Formatter or JSON Validator.

Related Categories

Continue into adjacent categories when your workflow expands beyond this task type.