Tools that Just Work.
Over 70 free tools for Engineers, Developers, and Designers.
100% Client-Side. Your files never leave your browser.
PDF Tools
Image to PDF
Convert JPG, PNG, HEIC images into PDF.
Merge PDF
Combine multiple PDF files into one.
Split PDF
Split PDF into multiple files.
Rotate PDF
Rotate PDF pages.
Protect PDF
Add password protection to PDF.
Unlock PDF
Remove password from PDF.
Watermark PDF
Add watermark to PDF pages.
PDF to Image
Convert PDF pages to images.
Remove Pages
Remove pages from PDF.
Reorder PDF
Reorder PDF pages.
Image Tools
Image Compressor
Compress images without losing quality.
Image Resizer
Resize images to any dimension.
Image Converter
Convert between image formats.
Crop Image
Crop images to custom dimensions.
Flip Image
Flip images horizontally or vertically.
Image Filters
Apply filters and effects to images.
HEIC to JPG
Convert HEIC images to JPG.
Engineering & Math
Ohm's Law Calc
Calculate Voltage, Current, Resistance.
Binary/Hex Converter
Convert between Binary, Octal, Decimal, Hex.
Resistor Color Code
Calculate resistor value from color bands.
LED Resistor Calc
Calculate resistor for LED circuits.
Voltage Divider
Calculate voltage divider circuits.
Capacitor Converter
Convert capacitor values.
Wire Gauge
Wire gauge to diameter converter.
Frequency Converter
Convert frequency units.
Bitwise Calculator
Perform bitwise operations.
Battery Life Calc
Estimate battery runtime.
Energy Cost Calc
Calculate electricity costs.
Color Tools
Converters
Length Converter
Convert length units.
Weight Converter
Convert weight units.
Temperature
Convert temperature units.
Time Converter
Convert time units.
Speed Converter
Convert speed units.
Volume Converter
Convert volume units.
Area Converter
Convert area units.
Data Converter
Convert data size units.
Pressure Converter
Convert pressure units.
Cooking Converter
Convert cooking measurements.
Developer Tools
JSON Formatter
Format and validate JSON.
CSV to JSON
Convert CSV to JSON format.
JSON to CSV
Convert JSON to CSV format.
SQL Formatter
Format and beautify SQL queries.
XML Formatter
Format and validate XML.
Markdown to HTML
Convert Markdown to HTML.
Base64 Encoder
Encode/decode Base64.
URL Encoder
Encode/decode URL strings.
HTML Encoder
Encode/decode HTML entities.
Hash Generator
Generate MD5, SHA256 hashes.
UUID Generator
Generate unique UUIDs.
Diff Checker
Compare two text files.
Text Tools
Word Counter
Count words, characters, lines.
Case Converter
Convert text case styles.
Find & Replace
Find and replace text.
Remove Duplicates
Remove duplicate lines.
Sort List
Sort lines alphabetically.
Add Numbers
Add line numbers to text.
Lorem Ipsum
Generate placeholder text.