FreeKitOnline
Free online tools that just work
Our tools
JSON Formatter & Validator
Pretty-print, validate and minify JSON instantly.
Regex Tester & Debugger
Test regular expressions with live match highlighting.
Base64 Encode / Decode
Encode text or decode Base64 with one click.
Unix Timestamp Converter
Convert between Unix time and readable dates.
UUID Generator
Create RFC-4122 v4 unique identifiers.
Strong Password Generator
Create secure, random passwords.
Random String Generator
Generate random alphanumeric strings.
Lorem Ipsum Generator
Placeholder text for designs and mockups.
Word & Character Counter
Count words, characters, lines, and sentences.
Slug Generator
Turn titles into URL-friendly slugs.
Uppercase Text Converter
Convert any text to ALL CAPS instantly.
Lowercase Text Converter
Convert any text to lowercase in one click.
Title Case Converter
Capitalize the first letter of each word.
Sentence Case Converter
Capitalize the first letter of each sentence.
Reverse Text Tool
Flip any string backwards, character by character.
Trim Whitespace per Line
Remove leading/trailing spaces from every line.
Remove Duplicate Lines
Delete repeated lines while keeping order.
Sort Lines Alphabetically
Order your lines A to Z instantly.
URL Encode / Decode
Encode or decode strings for safe URLs.
URL Decode
Turn %XX encoded text back into readable form.
HTML Entity Encode / Decode
Escape and unescape HTML special characters.
HTML Decode
Convert HTML entities back to characters.
Text to Hex / Hex to Text
Convert text and hex bytes both ways.
Hex Decode
Turn hex byte strings back into text.
Text to Binary / Binary to Text
Convert text to 0/1 bits and back.
Binary Decode
Reconstruct text from 0/1 bit strings.
Remove Extra Spaces
Collapse multiple spaces and trim text.
Add Line Numbers
Prefix every line with its number.
Remove Line Breaks
Join lines into one clean paragraph.
Number Base Converter
Convert between decimal, hex, binary, octal.
Color Format Converter
Convert HEX to RGB and HSL instantly.
Length Converter
Meters, feet, miles and more.
Weight Converter
Kilograms, pounds, ounces and more.
Temperature Converter
Celsius, Fahrenheit, Kelvin.
Data Storage Converter
Bytes, KB, MB, GB, TB and binary units.
Area Converter
Square meters, acres, hectares and more.
Volume Converter
Liters, gallons, cups and more.
Speed Converter
km/h, mph, m/s, knots.
Time Converter
Seconds, minutes, hours, days, weeks.
Pressure Converter
Pa, kPa, bar, psi, atm.
Fuel Economy Converter
mpg, L/100km.
Angle Converter
Degrees, radians, gradians.
Percentage Calculator
Find percentages, parts and changes.
Loan / Mortgage Calculator
Monthly payment, total interest.
Tip Calculator
Split the bill and tip.
BMI Calculator
Body mass index from weight & height.
Age Calculator
Exact age from a birth date.
Date Difference Calculator
Days between two dates.
Compound Interest Calculator
Future value of savings.
Simple Interest Calculator
Interest on principal only.
Sales Tax / VAT Calculator
Add tax to a price.
Discount Calculator
Sale price after a discount.
Hourly to Salary Calculator
Annual income from hourly rate.
Meta Tag Generator
Generate HTML meta tags.
Open Graph Tag Generator
Social share cards for any URL.
Keyword Density Analyzer
See word frequency in your text.
robots.txt Generator
Build a robots.txt file.
Sitemap XML Generator
Build an XML sitemap.
Extract URLs
Pull all links out of text.
Remove Empty Lines
Strip blank lines from text.
Sort Words
Alphabetize the words in text.
Shuffle Lines
Randomize the order of lines.
Word Frequency Counter
Count how often each word appears.
About FreeKitOnline
A fast, free, privacy-friendly collection of online tools. No sign-up required. Every tool runs entirely in your browser, so your data never leaves your device.