Every free tool on LahbTools, organised by category.
Your public IP address and geolocation
What your browser reveals about you
Identify vendor from MAC address OUI prefix
Look up Bluetooth Company ID (e.g. 0x004C = Apple)
Frequency ↔ wavelength for antenna design
Find mobile network operators by country
Reduce file size without visible quality loss
Change dimensions for web or social media
PNG, JPG, WebP and more
Trim and reframe your photos
Length, weight, volume and more
°C, °F, Kelvin — instant conversion
Live exchange rates worldwide
HEX, RGB, HSL and CSS values
Combine multiple PDFs into one
Extract pages from a PDF
Shrink PDFs for email or upload
Encode or decode Base64 strings
Count words, characters and sentences
UPPER, lower, Title, camelCase and more
Generate placeholder text instantly
Remove duplicate lines from lists
Beautify and validate JSON
Encode or decode URL strings
SHA-1, SHA-256, SHA-512 hashes
Strong, random passwords on demand
Tip, discount, tax — fast
Standard scientific calculator
Printable math reference sheets for grades K–6
Convert numbers to Roman numerals
Braille dot patterns A–Z with live text encoder
Encode and decode Morse code with audio playback
Alpha, Bravo, Charlie — the international spelling alphabet
Body mass index in metric or imperial
Exact age from any birth date