68 free developer tools

Format JSON, generate hashes, convert numbers, compress images — everything runs in your browser, nothing is uploaded.

Formatter & Minifier

15 tools

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

Format JSON with readable indentation while preserving data.

Compress JSON to a single line by removing all whitespace.

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.

Pretty-print XML with consistent indentation.

Strip whitespace from XML to shrink document size.

HTML Beautifier

Re-indent messy HTML into clean, readable markup.

Shrink HTML by removing comments and extra whitespace.

Format CSS rules with one declaration per line.

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.

Format SQL queries with clauses on their own lines.

Collapse SQL to a single line for compact storage.

Hash & Cryptography

10 tools

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

Encode text to Base64, full Unicode support.

Decode Base64 strings back to readable text.

Percent-encode text for safe use in URLs.

Decode percent-encoded URLs back to readable text.

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.

Convert hexadecimal numbers to decimal.

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.

Convert binary numbers to hexadecimal.

Convert hexadecimal numbers to binary.

Complete printable ASCII reference with decimal, hex, and octal codes.

Convert hex byte sequences back to text.

Convert text to hexadecimal byte values.

Decode 8-bit binary sequences into text.

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.

Convert hex color codes to rgb() values.

Convert rgb() colors to hex codes.

Convert hex colors (with alpha) to rgba() values.

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.

Test regular expressions live with match highlighting.

Find and replace text using regular expressions.

Diff two texts line by line.

Count words, characters, sentences, and reading time live.

Character Count

Count characters with and without spaces, live.

Convert text between 9 cases: camel, snake, kebab, and more.

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.

Resize images in your browser — no upload.

Crop images by pixel coordinates, right in the browser.

Shrink PNG file size in the browser.

Reduce JPEG file size with quality control.

Progressive JPEG

Convert JPEG to progressive encoding.

Image to Base64

Convert images to Base64 data URIs.

Inspect EXIF metadata inside JPEG files.

Strip EXIF metadata from JPEGs before sharing.

About This Site

A collection of free, privacy-first developer and maker tools that run entirely in your browser. Format code, generate hashes, convert number bases, compress images, and turn photos into bead patterns or pixel art — your data never leaves your device. No account, no watermarks, no limits.

Popular tool categories

Formatter & Minifier Hash & Cryptography Number Conversion String & Text Image Utilities All tools

Frequently asked questions

Are these tools really free?

Yes. Every tool is free with no signup, no usage caps, and no watermarks. Some maker tools (like the bead pattern makers) offer optional PDF downloads — also free.

Do my files and data stay private?

Yes. All processing happens locally in your browser using JavaScript and WebAssembly. Your text, code, and images are never uploaded to a server.

Do the tools work offline?

After the page has loaded, most tools keep working without a network connection because all computation happens on your device.

Can I use the results commercially?

Yes. Output you generate (formatted code, hashes, compressed images, bead patterns) is yours to use however you like, including commercially.

Private by design

Every tool runs locally in your browser. Your text, code, and images never leave your device — no accounts, no tracking, no upload.