Browse every ATOMOS Tool
A complete crawlable directory of published browser tools. Every listed tool is currently free to use.
Text & content
Case Converter
Convert text to uppercase, lowercase, title case, or sentence case.
Line Numberer
Add sequential line numbers to multi-line text.
List Randomizer
Shuffle a list of lines locally in your browser.
Meta Description Checker
Check the length and readability of a proposed search-result description.
Random Number Generator
Generate secure random integers within a selected range.
Remove Duplicate Lines
Remove repeated lines while preserving original order.
Sentence Counter
Estimate sentence, word, and paragraph counts in pasted text.
Sort Lines
Sort text lines alphabetically or reverse alphabetically.
Word Counter
Count words, characters, sentences, and estimated reading time.
Word Frequency Counter
Count repeated words and identify the most common terms in a block of text.
Developer
QR Code Generator
Create and download QR codes for URLs and text locally in your browser.
Base64 Encoder / Decoder
Encode plain text to Base64 or decode Base64 text.
Color Contrast Checker
Check the WCAG contrast ratio between two hexadecimal colors.
Color Converter
Convert HEX colors to RGB and RGB colors to HEX.
CSV to JSON Converter
Convert simple comma-separated values into a JSON array.
Hex / Decimal Converter
Convert between hexadecimal and decimal integers.
HTML Entity Encoder
Encode special characters for HTML or decode HTML entities.
JSON Formatter
Format, minify, and validate JSON directly in your browser.
JSON to CSV Converter
Convert a flat JSON array of objects into CSV in your browser.
URL Slug Generator
Convert a title or phrase into a clean lowercase URL slug.
Timestamp Converter
Convert Unix timestamps to readable dates and back.
Unix Time Now
View the current Unix timestamp in seconds and milliseconds.
URL Encoder / Decoder
Encode or decode URL components safely.
URL Query Parser
Parse a URL into origin, path, query parameters, and fragment.
UUID Generator
Generate standards-compatible random UUID version 4 identifiers.
Calculators
Age Calculator
Calculate age from a birth date to today.
Aspect Ratio Calculator
Calculate matching image or video dimensions while preserving aspect ratio.
BMI Calculator
Estimate body mass index from weight and height.
Character Counter
Count characters, words, lines, and non-space characters in text.
Compound Interest Calculator
Estimate future value using principal, annual rate, term, and compounding frequency.
Date Difference Calculator
Calculate the number of days between two dates.
Discount Calculator
Calculate final price and savings from a percentage discount.
Loan Payment Calculator
Estimate a fixed monthly loan payment.
Pace Calculator
Estimate running or walking pace from distance and elapsed time.
Password Length Estimator
Estimate brute-force search space from password length and character-set size.
Percentage Calculator
Calculate percentages, increases, decreases, and percentage differences.
Percentage Change Calculator
Calculate the percentage increase or decrease between two values.
Profit Margin Calculator
Calculate gross profit, margin, and markup from cost and selling price.
Reading Time Calculator
Estimate reading time, speaking time, word count, and character count for pasted text.
Sales Tax Calculator
Estimate sales tax and total from a price and tax rate.
Screen Aspect Calculator
Calculate simplified aspect ratio from width and height.
Split Bill Calculator
Split a bill and optional tip across multiple people.
Text Cleaner
Remove extra spaces, blank lines, and formatting clutter.
Tip Calculator
Calculate tip amount and total bill.
Whitespace Normalizer
Remove repeated spaces, trim lines, and reduce excessive blank lines.