159 free online tools — find what you need
Try: JSON tools · Finance · PDF · CSS & color
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JSON Formatter & Validator
Format, validate, minify JSON. Error line detection.
QR Code Generator & Scanner
Create and scan QR codes instantly. No app needed.
Password Generator
Generate strong, random passwords. Configurable length.
Loan & Mortgage Calculator
Loan calculator. Monthly payment, amortization, early payoff.
Image Resizer & Compressor
Resize & compress images. Canvas API, no upload.
PDF Merge
Combine multiple PDFs into one. Drag-and-drop, reorder, instant download.
Base64 Encoder & Decoder
Encode and decode Base64 strings. Essential developer utility.
Word & Character Counter
Count words, characters, sentences, and reading time.
Color Code Converter
Convert HEX to RGB and HSL. Pick colors and copy codes.
UUID Generator
Generate UUID v4 identifiers. Browser crypto API.
BMI Calculator
Check your Body Mass Index instantly with WHO classification. Metric & imperial units, privacy-first.
Case Converter
UPPER, lower, camelCase, snake_case, 8 formats.