Percentage Calculator
Calculators
Find percentages, increases, decreases and what percent one number is of another.
All Tools
Search, filter by category, or reopen a recent or favorite tool. New tools appear here as they are added.
Percentage Change Calculator
Calculators
Compare an original number with a new one and see the percent change. From 80 to 100 is a 25% rise; 100 back to 80 is a 20% drop. An original of 0 is rejected.
Discount Calculator
Calculators
Take a percent off a price and see the amount saved and what you pay. Type plain numbers. A currency symbol is invalid, and a discount above 100% is rejected.
Age Calculator
Calculators
Count years, months, and days from a birth date to today or a later date. An earlier date is rejected. Leap days follow the calendar, not a 365-day year.
Word Counter
Text Tools
Count words, characters, sentences and estimate reading time in your browser.
Character Counter
Text Tools
Count characters, words, and lines as you type, and a total without spaces. One emoji counts as one Unicode character. Sentences are not split on this page.
Case Converter
Text Tools
Convert text to uppercase, lowercase, title case, camelCase and more in your browser.
Lorem Ipsum Generator
Text Tools
Generate placeholder paragraphs, sentences, or words from Latin. It starts with the classic opening. Limits are 20 paragraphs, 50 sentences, or 500 words.
JSON Formatter
Developer Tools
Pretty-print JSON, minify it, or check that it parses in the page. Comments, trailing commas, and single quotes fail. It does not turn the result into CSV.
Image Compressor
Image Tools
Compress JPG, PNG and WebP images in your browser without uploading them.
Image Resizer
Image Tools
Resize images in your browser. Set width and height, lock aspect ratio, then download.
Image Cropper
Image Tools
Drag a box over a JPG, PNG, or WebP and download the pixels inside that box. Frames are free, 1:1, 4:3, or 16:9. Rotation and filters are not on this page.
Image Converter
Image Tools
Convert JPG to PNG or PNG to JPG in your browser, including a background color for transparency.
Base64 Encoder
Developer Tools
Encode text to Base64 or decode it back, using UTF-8. Anyone can decode the result, so it is not a way to hide a password. A file drop is not accepted.
UUID Generator
Developer Tools
Generate one or many UUID v4 values in your browser using a secure random source.
URL Encoder
Developer Tools
Encode or decode URL components in your browser with encodeURIComponent.
Unix Timestamp Converter
Developer Tools
Convert Unix timestamps to dates and dates back to timestamps, in seconds or milliseconds.
UTM Builder
SEO & Utilities
Add utm_source, utm_medium, and utm_campaign to a link. Term and content are optional. Blank fields are omitted, and this page does not record a visit.
Unit Converter
Calculators
Convert length, weight, or temperature between units as you type. Currency, area, and volume are not included. A temperature below absolute zero is rejected.
Slug Generator
SEO & Utilities
Turn a title into a lowercase, hyphenated permalink. Latin accents are removed, while letters such as 你好 stay. It does not check that the address is unused.
PDF to JPG
Image Tools
Convert PDF pages to JPG images in your browser. Choose the first page, selected pages, or all pages.
Hex to RGB
Developer Tools
Convert 3-digit, 6-digit and 8-digit hex colors to RGB, RGBA and HSL in your browser.
Color Picker
Image Tools
Pick a color with the browser color input and copy HEX, RGB or HSL values.
QR Code Generator
SEO & Utilities
Create a QR code from text or a URL in your browser, then download a PNG.
QR Code Scanner
SEO & Utilities
Scan a QR code with your camera or an uploaded image. Processing stays in your browser.
HTML Encoder / Decoder
Developer Tools
Encode or decode HTML entities in your browser. Input is treated as text, not executed.
HTML Minifier
Developer Tools
Minify HTML in your browser with a conservative pass that keeps pre, textarea, script and style content.
CSS Minifier
Developer Tools
Minify CSS in your browser while preserving strings, URLs, comments and important spacing.
JavaScript Minifier
Developer Tools
Minify JavaScript in your browser with a parser. The code is not executed.
Password Generator
SEO & Utilities
Generate a random password in your browser with crypto.getRandomValues. Nothing is stored.
Image to PDF
Image Tools
Turn up to 20 JPG or PNG images into one PDF, in the order you set. WebP is not accepted. Sides over 2,000 pixels are downsampled, and Fill can crop to cover.
PDF Merger
Image Tools
Merge multiple PDF files in order and download the combined document locally.
PDF Splitter
Image Tools
Copy chosen pages into a new PDF with ranges such as 1-3,6. The original file stays unchanged. A reversed range is rejected, and the copy holds up to 80 pages.
PDF Page Counter
Image Tools
Count the pages in a PDF file locally, without uploading the document.
Image Color Analyzer
Image Tools
Approximate the dominant colors in a JPG, PNG or WebP image using sampled pixels.
Color Contrast Checker
Developer Tools
Check WCAG contrast between foreground and background colors, with pass/fail for AA and AAA.
CSS Gradient Generator
Developer Tools
Build linear, radial or conic CSS gradients, or gradient text, and copy the CSS or HTML.
Box Shadow Generator
Developer Tools
Tune offset, blur, spread and color, then copy a CSS box-shadow value.
QR Code Generator Pro
SEO & Utilities
Create QR codes for URLs, Wi-Fi, email, phone, SMS or contacts, with colors and download.
Random Number Generator
Calculators
Generate random integers or decimals with crypto.getRandomValues, including unique draws.
PDF Compressor
Image ToolsNew
Reduce PDF file size in your browser with rewrite or raster presets. Compression is not guaranteed.
PDF to Text
Image ToolsNew
Extract selectable text from a PDF in your browser. Scanned pages need OCR, which is not included.
Image to Text
Image Tools
Read English text from one photo in your browser. The first run downloads the recognition files. A real photo can come back with wrong letters.
PDF Metadata Viewer / Remover
Image Tools
View common PDF document Info fields and download a copy with those fields cleared, locally.
Text to PDF
Image Tools
Turn plain text into a multi-page PDF in your browser, with wrapping, margins and optional page numbers.
Word to PDF
Image Tools
Read the words from a .docx file and place them in a plain PDF. Images, tables as grids, and text styling are left out.
Markdown to HTML
Developer ToolsNew
Convert Markdown to HTML source in your browser. Raw HTML is escaped and not executed.
HTML to Markdown
Developer Tools
Convert HTML source into Markdown in your browser. Input is treated as text and is not executed.
Text Diff Checker
Text ToolsNew
Compare original and modified text in your browser, with line or word differences and a readable summary.
Duplicate Line Remover
Text Tools
Remove duplicate lines from text in your browser while keeping the first occurrence of each line.
Whitespace Remover
Text Tools
Trim, collapse spaces, convert tabs and clean blank lines in text, entirely in your browser.
Line Sorter
Text Tools
Sort lines A–Z, numerically or by length in your browser, with optional trim, empty-line skip and dedupe.
AI Prompt Generator
AI Tools
Build a structured prompt from a topic, goal, audience, and format. Generate prompt stays in the browser. Generate with AI sends the fields to Gemini.
Prompt to Image Generator
AI Tools
Turn a subject, setting, and style into an image prompt you can copy. This page does not generate an image.
Prompt to Video Generator
AI Tools
Describe a shot, camera move, and action as a video prompt. This page does not render a video.
AI Article Detector
AI Tools
Review sentence length, repeated phrases, and vocabulary in a draft. This is pattern analysis, not a verdict on authorship.
AI Article Compressor
AI Tools
Shorten a long draft in the browser, or send it to Gemini to compress it. Submitted text is not saved on this site.
AI Text Humanizer
AI Tools
Rewrite stock phrases with a fixed list in the browser. Humanize with AI sends the draft to Gemini. Neither result is a way to hide how a draft was written.
Tip Calculator
Calculators
Split a bill by tip percentage and number of people, including the tip and the total per person.
Sales Tax Calculator
Calculators
Add a sales tax rate to a price and see the tax amount and the final price.
Date Difference Calculator
Calculators
Count the days between two dates, then see weeks and a calendar span in years, months, and days.
Find and Replace
Text Tools
Replace the first match or every match in text you paste, with an optional case-sensitive search.
Remove Line Breaks
Text Tools
Turn wrapped lines into a paragraph, delete the breaks, or keep a blank line between paragraphs.
Add Line Numbers
Text Tools
Number each line of pasted text. Set the starting number and the separator.
JSON to CSV
Developer Tools
Turn an array of JSON objects into CSV, including commas and quotes inside cells.
CSV to JSON
Developer Tools
Turn CSV with a header row into JSON, including quoted commas and escaped quotes.
Regex Tester
Developer Tools
Test a regular expression against sample text and see each match, its position, and its groups.
Hash Generator
Developer Tools
Create a SHA-256, SHA-384, or SHA-512 digest of text in your browser. This is a hash, not encryption.
Compound Interest Calculator
Calculators
See how a starting amount grows with compound interest, optional monthly contributions, and a simple-interest comparison.
Loan Calculator
Calculators
Estimate the monthly payment, interest, and payoff schedule for a fixed-rate installment loan, including a personal loan.
Mortgage Calculator
Calculators
Estimate principal and interest, optional housing costs, a 15-year and 30-year comparison, and an extra-payment payoff.
Auto Loan Calculator
Calculators
Estimate a car loan payment from vehicle price, down payment, trade-in, tax, fees, and APR.
Home Affordability Calculator
Calculators
Estimate a home price from income, debts, down payment, rate, and housing costs. This is a budget estimate, not an approval.
Debt Payoff Calculator
Calculators
Estimate how long several debts take to pay off, and the interest, under a highest-interest or smallest-balance plan.
Credit Card Payoff Calculator
Calculators
Estimate how long a card balance takes to pay off from the APR and the minimum or fixed payment you enter.
Savings Goal Calculator
Calculators
Estimate the regular contribution that reaches a savings target from what you have already saved and a rate you choose.
Hourly Wage Calculator
Calculators
Convert an hourly rate and a weekly schedule into weekly, monthly, and annual pay, or turn a salary into an hourly rate.
Paycheck Estimator
Calculators
Estimate net pay from gross pay and the pre-tax, withholding, and post-tax amounts you enter.
Rent vs Buy Calculator
Calculators
Compare estimated rent paid with the estimated cash cost and equity of buying over a period you choose.
Fuel Cost Calculator
Calculators
Estimate fuel used and the cost of a trip from distance, fuel economy, and the price you enter.
Business Days Calculator
Calculators
Count weekdays between two dates, and leave out any dates you exclude.
GPA Calculator
Calculators
Calculate a credit-weighted GPA from letter grades or grade points on a common 4.0 map.
Square Footage Calculator
Calculators
Multiply each room length by its width, then add the rooms. Totals are in square feet and square meters. It measures rectangles, not closets or triangles.
Number to Words Converter
Text Tools
Turn a whole number into English words, or read simple number words back into a number.
Time Zone Converter
Developer Tools
Convert a date and time between two time zones using the browser time-zone list.
URL Parser
SEO & Utilities
Split an absolute URL into protocol, host, port, path, fragment, and query parameters.
Morse Code Translator
Text Tools
Turn A-Z and 0-9 text into International Morse code, or read Morse back into text.
Roman Numeral Converter
Text Tools
Convert a whole number from 1 through 3999 into a Roman numeral, or read a numeral back into a number.
Aspect Ratio Calculator
Calculators
Simplify a width and height into a ratio, or find the missing side from a ratio.
JWT Decoder
Developer Tools
Decode a JSON Web Token header and payload in your browser. The signature is not checked.
Robots.txt Generator
SEO & Utilities
Build robots.txt text from user-agent, allow, and disallow rules, plus an optional sitemap URL.
Time Calculator
Calculators
Add or subtract hours and minutes, then read the total as hours, minutes, and total minutes.
Average Calculator
Calculators
Find the mean, median, and mode of a list of numbers separated by commas or spaces.
Text Repeater
Text Tools
Repeat a word, phrase, or line a set number of times, with a space, a new line, or nothing between copies.
Password Strength Checker
SEO & Utilities
Estimate a typed password from the character types it uses. The password stays in this tab and is not checked against a breach list.
.gitignore Generator
Developer Tools
Build .gitignore text from Node, Next.js, environment, and other templates, plus your own patterns.
Cron Expression Generator
Developer Tools
Build a five-field cron expression or explain one. Sunday is 0. Month and weekday names are not accepted.
Favicon Generator
Image Tools
Draw a letter or a solid color as PNG icons at 16, 32, and 180 pixels, plus an ICO of the two smaller sizes.
Meta Tag Generator
SEO & Utilities
Write title, description, robots, canonical, Open Graph, and Twitter tags as HTML. No live page is fetched.
Open Graph Preview
SEO & Utilities
Check a public page's title, description, image, and Twitter card. The URL is sent to this site. Private and local addresses are rejected.
CPS Test
SEO & UtilitiesNew
Free CPS test (click speed test): click for 1 to 60 seconds, including the 10-second click test, and see your clicks per second, rating, and best score.