Free Online Tools
Convert, calculate, and process — all in your browser. No sign-up, no uploads to our servers.
Browse by category
Image Tools
Convert, compress, and resize images
File Converters
Convert between file formats
JSON Formatter
Format and validate JSON. Pretty-print or minify.
CSV to JSON
Convert CSV text to JSON. No upload, client-side only.
JSON to CSV
Convert JSON array to CSV text in your browser.
XML Formatter
Format and indent XML. Validate structure.
Markdown Preview
Preview Markdown as HTML. Renders in the browser.
Unit Converters
Convert units of measurement
Text Tools
Process and transform text
Text Case Converter
Convert text to uppercase, lowercase, title case, and more.
Word Counter
Count words, characters, and sentences in text.
Find and Replace
Find and replace text. Supports regex.
Reverse Text
Reverse text or lines. Reverse each line or the whole block.
Sort Lines
Sort lines alphabetically or numerically. A–Z, Z–A, or random.
Remove Extra Spaces
Remove extra spaces and normalize whitespace.
Remove Duplicate Lines
Remove duplicate lines from text. Keep first or keep unique.
Regex Tester
Test regular expressions against text. See matches in real time.
Text Diff
Compare two texts and see differences. Side-by-side or unified.
HTML Encoder / Decoder
Encode or decode HTML entities. & < > etc.
URL Encoder / Decoder
Encode or decode URL-encoded strings. Percent-encoding.
Slug Generator
Convert text to a URL-friendly slug (lowercase, hyphens, no special chars).
Morse Code Encoder / Decoder
Encode or decode text to Morse code. Runs in your browser.
Binary to Text / Text to Binary
Convert text to binary (ASCII) and binary to text.
Extract URLs from Text
Find and extract all URLs (and optionally emails) from text.
Remove Accents / Diacritics
Remove accents and diacritical marks from text (é → e).
Add Line Numbers
Add line numbers to each line of text.
Calculators
Math and conversion calculators
Calculator
Simple and scientific calculator.
Tip Calculator
Calculate tip and split the bill. Percentage or custom amount.
BMI Calculator
Calculate Body Mass Index from height and weight.
Percentage Calculator
What is X% of Y? What percent is X of Y? Increase/decrease by %.
Compound Interest Calculator
Calculate compound interest. Principal, rate, time.
Date Difference Calculator
Calculate the number of days between two dates.
Age Calculator
Calculate age from birth date to today or a specific date.
Roman Numerals Converter
Convert numbers to Roman numerals and Roman numerals to numbers.
Generators
Generate data and content
UUID Generator
Generate random UUIDs (v4) in the browser.
Lorem Ipsum Generator
Generate placeholder text for your designs.
Password Generator
Generate secure random passwords. Length, symbols, numbers.
Random Number Generator
Generate random numbers between min and max. Integers or decimals.
Color Palette Generator
Generate color palettes. Complementary, analogous, monochrome.
Fake Data Generator
Generate fake names, emails, phones, addresses. For testing.
Hash Generator
Generate SHA-256, SHA-384, SHA-512 hashes. Runs in browser.
Dice Roller
Roll one or more dice (d4, d6, d8, d10, d12, d20).
Coin Flip
Flip a virtual coin. Heads or tails.
Productivity
Utilities to get things done
Base64 Encode / Decode
Encode and decode Base64 text in the browser.
Timestamp Converter
Convert Unix timestamp to date and time. Or date to timestamp.
Color Converter
Convert between HEX, RGB, and HSL. Pick a color.
JSON Validator
Validate JSON syntax. See errors and fix.
List Randomizer
Randomize or shuffle a list. One item per line.
Find My IP
See your public IPv4 and IPv6 address. Fetched when you click.
Stopwatch
Simple stopwatch with lap times. Runs in your browser.
Countdown Timer
Count down from a set time. Minutes and seconds.
Why use these tools?
- Client-side — Your data never leaves your device.
- No accounts — Start using any tool immediately.
- Free — No payments required.
Frequently asked questions
- Do I need to create an account?
- No. All tools work without signing up. Just open a tool and use it.
- Is my data sent to your servers?
- No. Everything runs in your browser. Your files and text never leave your device.
- Are these tools really free?
- Yes. The site is free to use and supported by ads. No payments required.
- Can I use these tools offline?
- After you load a page once, many tools keep working without the network for text and numbers. Image and file tools need the page to load first.