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68 free developer tools

Format JSON, generate hashes, convert numbers, compress images — fast, free, and private. Everything runs in your browser.

Formatter & Minifier

15 tools

Beautify or minify JSON, XML, HTML, CSS, JavaScript, and SQL.

JSON Formatter
Format JSON with readable indentation while preserving data.
JSON Minifier
Compress JSON to a single line by removing all whitespace.
JSON Diff
Compare two JSON documents and see every difference by path.
JSON to XML Converter
Convert JSON objects into formatted XML with proper escaping.
XML to JSON Converter
Convert XML documents into clean, readable JSON.
XML Formatter
Pretty-print XML with consistent indentation.
XML Minifier
Strip whitespace from XML to shrink document size.
HTML Beautifier
Re-indent messy HTML into clean, readable markup.
HTML Minifier
Shrink HTML by removing comments and extra whitespace.
CSS Beautifier
Format CSS rules with one declaration per line.
CSS Minifier
Compress CSS by stripping comments and whitespace.
JavaScript Beautifier
Re-indent JavaScript with consistent brace style.
JavaScript Minifier
Compress JavaScript by removing comments and whitespace.
SQL Formatter
Format SQL queries with clauses on their own lines.
SQL Minifier
Collapse SQL to a single line for compact storage.

Hash & Cryptography

10 tools

Generate hashes, encode/decode data, and create secure passwords.

Base64 Encode
Encode text to Base64, full Unicode support.
Base64 Decode
Decode Base64 strings back to readable text.
URL Encode
Percent-encode text for safe use in URLs.
URL Decode
Decode percent-encoded URLs back to readable text.
MD5 Generator
Compute the MD5 hash of any text, live as you type.
SHA-1 Generator
Compute the SHA-1 hash of any text, live as you type.
SHA-256 Generator
Compute the SHA-256 hash of any text, live as you type.
SHA-384 Generator
Compute the SHA-384 hash of any text, live as you type.
SHA-512 Generator
Compute the SHA-512 hash of any text, live as you type.
Password Generator
Generate strong random passwords with configurable character sets.

Number Conversion

26 tools

Convert between number systems, color formats, fractions, and Roman numerals.

Hex to Decimal
Convert hexadecimal numbers to decimal.
Decimal to Hex
Convert decimal numbers to hexadecimal.
Octal to Decimal
Convert octal numbers to decimal.
Decimal to Octal
Convert decimal numbers to octal.
Binary to Decimal
Convert binary numbers to decimal.
Decimal to Binary
Convert decimal numbers to binary.
Binary to Hex
Convert binary numbers to hexadecimal.
Hex to Binary
Convert hexadecimal numbers to binary.
ASCII Table
Complete printable ASCII reference with decimal, hex, and octal codes.
Hex to ASCII
Convert hex byte sequences back to text.
ASCII to Hex
Convert text to hexadecimal byte values.
Binary to Text
Decode 8-bit binary sequences into text.
Text to Binary
Encode text as 8-bit binary groups.
Fraction to Decimal
Convert fractions like 3/4 to decimal values.
Decimal to Fraction
Convert decimals to exact simplified fractions.
Percent to Decimal
Convert percentages to decimal numbers.
Decimal to Percent
Convert decimal numbers to percentages.
Percent to Fraction
Convert percentages to simplified fractions.
Fraction to Percent
Convert fractions to percentages.
Hex to RGB
Convert hex color codes to rgb() values.
RGB to Hex
Convert rgb() colors to hex codes.
Hex to RGBA
Convert hex colors (with alpha) to rgba() values.
RGBA to Hex
Convert rgba() colors to 8-digit hex codes.
Roman Numerals Chart
Reference table of Roman numerals with values.
Roman to Numbers
Convert Roman numerals to integers.
Numbers to Roman
Convert integers to Roman numerals.

String & Text

9 tools

Transform, analyze, and manipulate text and strings.

Online Text Editor
A quick scratchpad for any text — nothing leaves your browser.
Regex Tester
Test regular expressions live with match highlighting.
Regex Replace
Find and replace text using regular expressions.
Text Compare
Diff two texts line by line.
Word Counter
Count words, characters, sentences, and reading time live.
Character Count
Count characters with and without spaces, live.
Case Converter
Convert text between 9 cases: camel, snake, kebab, and more.
Reverse Text
Reverse characters in any text, emoji-safe.
Number to Words
Convert integers to English words.

Image Utilities

8 tools

Compress, convert, and inspect images right in your browser.

Image Resize
Resize images in your browser — no upload.
Image Crop
Crop images by pixel coordinates, right in the browser.
Compress PNG
Shrink PNG file size in the browser.
Compress JPEG
Reduce JPEG file size with quality control.
Progressive JPEG
Convert JPEG to progressive encoding.
Image to Base64
Convert images to Base64 data URIs.
EXIF Viewer
Inspect EXIF metadata inside JPEG files.
EXIF Remover
Strip EXIF metadata from JPEGs before sharing.

About These Tools

Every tool runs entirely in your browser: your data, code, and files are processed on your device and never uploaded to a server. No account, no watermarks, no usage limits — open a tool, paste your input, get the result, and copy it out.

Frequently asked questions

Are these developer tools free?

Yes — every tool is completely free with no signup, no usage limits, and no watermarked output.

Is my data safe?

All processing happens locally in your browser. Text, code, hashes, and image files never leave your device.

Do I need to install anything?

No. The tools are web apps that run in any modern desktop or mobile browser.