All tools

Age Calculator

Find your exact age in years, months and days.

Average Calculator

Calculate the average of multiple numbers.

BMI Calculator

Height and weight in. BMI and a range out.

Calorie Calculator

Find out calories based on weight, height and activity.

Compound Interest Calculator

Principal, rate and years. See the balance grow year by year.

Date Calculator

Calculate date difference, add or subtract days.

Discount Calculator

Calculate discounts, savings and final price.

Fraction Calculator

Add, subtract, multiply and divide fractions.

GST / VAT Calculator

Add or remove sales tax. Presets for Pakistan, India, UK and a custom rate.

Ideal Weight Calculator

Devine and Robinson estimates from height. Not a goal, just a range.

Interest Calculator

Simple and compound interest calculations.

Loan Calculator

Calculate monthly payment, interest and total cost.

Mortgage Calculator

Home price, down payment, rate and term. Monthly payment and total interest.

Overtime Calculator

Regular hours plus overtime at 1.5x or a custom multiplier.

Ovulation Calculator

Estimate a fertile window from cycle length and last period.

Pace Calculator

Finish time, distance or pace. Useful for a run or a walk.

Percentage Calculator

Calculate percentages, increase or decrease of values.

Pregnancy Due Date

Estimate a due date from the last period. Screening only, not medical advice.

Protein Calculator

A daily protein range from body weight and how hard you train.

Ratio Calculator

Find the ratio between numbers.

Salary Calculator

Calculate your monthly and yearly salary.

SIP Calculator

Monthly investing with a yearly return. Future value, not a promise.

Sleep Calculator

Pick a wake time. See bedtimes that land on 90-minute cycles.

TDEE Calculator

Daily calorie burn from age, size and activity. Same idea as the calorie page, more detail.

Time Calculator

Calculate time duration, add or subtract time.

Timezone Converter

Convert a date and time between cities. No live clock API.

Tip Calculator

Find the right tip amount for any bill.

Water Intake Calculator

A rough daily water target from weight and activity.

Attendance Calculator

Check attendance percentage and how many classes you can miss.

CGPA Calculator

Find your cumulative GPA across multiple semesters.

CGPA to Percentage

Common 9.5 and 10-point conversions. Your university may use another rule.

Exam Countdown

See how many days are left and how much to study each day.

Final Grade Calculator

Find the score you need on your final exam.

GPA Calculator

Calculate your semester GPA from course grades and credits.

Grade Calculator

Turn assignment scores into an overall percentage and letter grade.

Marks Percentage Calculator

Convert obtained marks into an overall percentage.

Percentage to GPA

Turn a percent into a 4.0 or 10-point GPA. Scales differ by school.

Study Time Calculator

Plan how many hours and sessions you need before an exam.

Weighted Grade Calculator

Calculate a course grade when categories have different weights.

Active → Passive Voice

Convert simple active sentences into passive voice.

Case Converter

Switch text to sentence, title, upper or lower case.

Character Counter

Count characters with and without spaces.

Find and Replace

Replace text in a draft. Optional match-case.

Formal Writing Converter

Convert casual notes into more formal language.

Grammar Checker

Catch common typos, spacing issues and repeated words.

Lorem Ipsum

Dummy paragraphs for a layout mockup.

Meta Description Counter

Count characters for a title and meta description.

Paragraph Rewriter

Rewrite each paragraph while keeping the document structure.

Paraphrasing Tool

Rewrite your own draft in Standard, Simple, Formal, Academic, Professional or Creative style.

Passive → Active Voice

Convert simple passive sentences into active voice.

Readability Checker

Estimate reading ease and grade level.

Remove Duplicate Lines

Keep the first copy of each repeated line.

Remove Extra Spaces

Collapse repeated spaces and tidy line breaks.

Sentence Rewriter

Rewrite individual sentences in a clearer style.

Sentence Simplifier

Turn long or dense sentences into easier wording.

Sort Lines

Sort lines A–Z or Z–A. Optional unique.

Summarizer

Pull the most informative sentences from a longer draft.

Text Compare

See which lines differ between two drafts.

Text Improver

Tighten wording and clean up frequent mistakes.

Text Reverser

Reverse characters, words or lines.

Text Rewriter

Rewrite a full passage without changing the core meaning.

Word Counter

Count words, characters, sentences and reading time.

Base64 to Image

Paste Base64 and download the image.

Blur Image

Soften a photo. Useful before you share a screenshot.

Favicon Generator

Create PNG favicons and a favicon.ico from a logo.

Grayscale Image

Turn a color photo into black and white.

HEIC to JPG

Turn an iPhone HEIC photo into a JPG.

Image Border

Add a solid border around a photo.

Image Compressor

Reduce image file size with a quality slider.

Image Converter

Convert an image to PNG, JPG or WebP.

Image Cropper

Crop a photo by dragging a selection box.

Image Dimension Checker

See width, height, aspect ratio and megapixels.

Image Flipper

Flip an image horizontally or vertically.

Image Metadata Viewer

Inspect dimensions, file size and JPEG camera fields.

Image Resizer

Set a new width and height, then download the file.

Image Rotator

Rotate an image by 90°, 180°, 270° or a custom angle.

Image to Base64

Encode an image as a Base64 data URL.

Image Watermark

Stamp text on a photo. Opacity and position are yours to set.

JPG → PNG

Convert a JPG photo to a PNG file.

JPG → WebP

Convert a JPG photo to WebP.

OG Image Resizer

Resize to 1200×630 for social link previews.

Passport Photo

Crop a photo to 35×45 mm or 2×2 inch at print size.

PNG → JPG

Convert a PNG image to JPG.

PNG → WebP

Convert a PNG image to WebP.

SVG → PNG

Convert an SVG graphic to a PNG image.

WebP → JPG

Convert a WebP image to JPG.

WebP → PNG

Convert a WebP image to PNG.

Compress PDF

Rebuild pages as JPEGs to shrink the file. Text stays readable, photos get softer.

Images to PDF

Drop JPG or PNG files and get one PDF, one image per page.

JPG → PDF

Combine JPG or PNG images into a PDF.

Merge PDF

Combine two or more PDFs into one file.

PDF → JPG

Turn each PDF page into a JPG.

PDF → Word

Extract PDF text into a Word-compatible file.

PDF to Text

Pull selectable text out of a PDF. Scanned pages need OCR, which this does not do.

Rotate PDF

Turn every page 90°, 180° or 270°.

Split PDF

Keep a page range and download that slice.

TXT → PDF

Turn plain text into a printable PDF.

Word → PDF

Convert a DOCX file to a simple text PDF.

CSV → JSON

Convert CSV rows into a JSON array.

JSON → CSV

Turn a JSON array of objects into a CSV file.

JSON → YAML

Convert JSON objects to YAML.

XML → JSON

Convert XML into a JSON object tree.

XML Formatter

Pretty-print XML with readable indentation.

YAML → JSON

Convert YAML documents to JSON.

GIF to Video

Convert an animated GIF into a video file.

MP4 → WebM

Convert an MP4 clip to WebM.

Video Compressor

Shrink a video file by lowering resolution and bitrate.

Video Format Converter

Convert a clip to WebM or MP4.

Video FPS Checker

Measure how many frames per second a video plays at.

Video Metadata Viewer

See duration, dimensions, file size and basic MP4 fields.

Video Resizer

Change a video’s width and height, including 1080p, 720p and 480p presets.

Video to GIF

Turn the start of a video into an animated GIF.

WebM → MP4

Convert a WebM clip to MP4 when the browser can encode it.

Acres to Hectares

Convert acres to hectares.

Bar to PSI

Convert bar to pounds per square inch.

Bytes → KB → MB → GB

Convert between bytes, kilobytes, megabytes and gigabytes.

Celsius → Fahrenheit

Convert °C to °F.

CM → Feet

Convert centimeters to feet.

CM → Inches

Convert centimeters to inches.

CM to MM

Convert centimeters to millimeters.

Fahrenheit → Celsius

Convert °F to °C.

Feet → CM

Convert feet to centimeters.

GB → MB

Convert gigabytes to megabytes.

Hectares to Acres

Convert hectares to acres.

HP to Watts

Convert horsepower to watts.

Inches → CM

Convert inches to centimeters.

KG → LBS

Convert kilograms to pounds.

KG to Stone

Convert kilograms to stone.

KM → Miles

Convert kilometers to miles.

KM/H to MPH

Convert kilometers per hour to miles per hour.

LBS → KG

Convert pounds to kilograms.

Length Converter

Convert meters, feet, inches, miles and more.

Liters → Gallons

Convert liters to US gallons.

MB → GB

Convert megabytes to gigabytes.

Meters → Feet

Convert meters to feet.

Meters to Yards

Convert meters to yards.

Miles → KM

Convert miles to kilometers.

ML to OZ

Convert milliliters to US fluid ounces.

MM to CM

Convert millimeters to centimeters.

MPH to KM/H

Convert miles per hour to kilometers per hour.

OZ to ML

Convert US fluid ounces to milliliters.

PSI to Bar

Convert pounds per square inch to bar.

Stone to KG

Convert stone to kilograms.

Temperature Converter

Convert Celsius, Fahrenheit and Kelvin.

Watts to HP

Convert watts to mechanical horsepower.

Weight Converter

Convert kilograms, pounds, ounces and grams.

Yards to Meters

Convert yards to meters.

Base64 Decoder

Decode a Base64 string back to text.

Base64 Encoder

Turn text into a Base64 string.

Binary Hex Decimal

Convert between binary, octal, decimal and hex.

Box Shadow Generator

Offset, blur and color. Copy the CSS.

Color Converter

Convert colors between HEX, RGB and HSL.

Contrast Checker

Foreground and background. WCAG AA / AAA.

Cron Explainer

Paste a 5-field cron and read it in English.

CSS Gradient Generator

Two colors, a direction, and the CSS to copy.

CSS Minifier

Minify CSS by removing comments and extra spaces.

Hash Generator

Create SHA-1, SHA-256, SHA-384 or SHA-512 hashes.

htaccess Redirect Generator

Build a 301 or 302 Apache redirect line.

HTML Entity Encoder/Decoder

Escape or unescape HTML entities.

HTML Formatter

Pretty-print HTML with readable indentation.

JS Minifier

Strip comments and extra space from JavaScript.

JSON Formatter

Pretty-print, check or minify JSON.

JSON Minifier

Remove extra whitespace from JSON.

JSON Validator

Check whether a JSON string is valid.

JWT Decoder

Read a JWT header and payload without verifying the signature.

Markdown → HTML

Turn Markdown into HTML.

Password Generator

Random passwords from your browser’s crypto API.

QR Code Generator

Type a URL or some text. Download a PNG.

Random String Generator

Letters, numbers or both. Good for IDs and test data.

Regex Tester

Test a regular expression against sample text.

robots.txt Generator

Allow or block crawlers and point at a sitemap.

SQL Formatter

Pretty-print SQL queries.

Unix Timestamp Converter

Convert Unix time to a readable date and back.

URL Decoder

Decode a percent-encoded URL string.

URL Encoder

Percent-encode a URL or query string.

UUID Generator

Generate random UUID v4 values.