Tool library
Search or filter private, browser-based tools. PDF, student, image, writing, developer and calculator utilities are grouped clearly.
Create strong, customizable passwords using secure browser randomness.
Turn links or text into a downloadable QR code in seconds.
Count words, characters, sentences, paragraphs and reading time.
Format, validate and copy JSON without sending data anywhere.
Generate one or many RFC 4122 version 4 identifiers.
Solve common percentage questions with instant results.
Encode plain text to Base64 or decode Base64 back to text.
Convert text to uppercase, lowercase, title case and more.
Generate SHA-256, SHA-384 or SHA-512 hashes locally.
Encode or decode URLs and query text safely.
Encode or decode HTML entities in your browser.
Inspect JWT headers and payloads without verifying or uploading them.
Test regular expressions and inspect every match instantly.
Convert CSV files to JSON and JSON arrays back to CSV.
Convert Unix timestamps to readable dates and back.
Turn titles into clean, URL-friendly slugs.
Fix spacing, empty lines, duplicates and punctuation.
Sort, reverse and remove duplicate lines.
Replace words or phrases with a live preview.
Generate placeholder paragraphs for layouts and mockups.
Review password length and character variety locally.
Generate secure hexadecimal tokens with browser cryptography.
Calculate exact age in years, months, days and total days.
Calculate body mass index from height and weight.
Estimate monthly payments, total cost and total interest.
Estimate long-term growth with recurring contributions.
Measure the time between two calendar dates.
Convert length, weight and temperature units.
Pick a color and convert HEX values to RGB.
Convert DOCX documents into clean PDF files directly in your browser.
Turn Excel worksheets into a downloadable PDF without uploading them.
Convert PowerPoint slide text into a PDF in your browser.
Extract PDF text into an editable Word-compatible document.
Extract PDF text and simple tables into an Excel workbook.
Create an editable PowerPoint presentation from PDF page text.
Combine multiple PDF files in the order you choose.
Extract selected pages or ranges into a new PDF.
Rotate every page in a PDF directly in your browser.
Turn JPG and PNG images into a single PDF.
Remove unwanted pages from a PDF in your browser.
Reorder, reverse or repeat PDF pages using a custom sequence.
Add a custom diagonal text watermark to every PDF page.
Place page numbers at the top or bottom of a PDF.
Trim page margins from every page in a PDF.
Create extra copies of selected pages inside a PDF.
Insert blank pages at the beginning or end of a PDF.
Update PDF title, author, subject and keywords privately.
Rewrite a PDF with compressed object streams to reduce overhead.
Reverse the complete page order of a PDF.
Create a new PDF containing only odd-numbered pages.
Create a new PDF containing only even-numbered pages.
Alternate pages from two PDF files into one document.
Reorder pages for double-sided booklet printing.
Place two PDF pages side by side on each sheet.
Scale every PDF page up or down by percentage.
Add custom header and footer text to PDF pages.
Clear title, author, subject and creator metadata.
Inspect PDF page count, dimensions and metadata.
Split a PDF into equal page groups and download each part.
Rotate only the PDF pages you choose.
Insert every page from one PDF into another at a selected position.
Swap two page positions without changing the rest of the document.
Scale mixed PDF pages to one consistent page size.
Add clean white margins around every PDF page.
Create a PDF containing only landscape pages.
Create a PDF containing only portrait pages.
Extract the first page, last page, or both.
Remove the first page, last page, or both.
Repeat the complete PDF multiple times in one file.
Extract one continuous page range into a new PDF.
Calculate a weighted average and approximate 4.0 GPA.
Find the score you need on your final exam.
Convert points into percentages and a 20-point grade.
Run a focused study timer without distractions.
Create and study flashcards saved on your device.
Build quick APA, MLA and Chicago website citations.
Resize images to exact pixel dimensions.
Convert images to WebP, JPG or PNG and adjust quality.
Calculate sale prices and savings instantly.
Add or remove VAT from any amount.
Calculate tips and split bills between people.
Track attendance and calculate classes needed for 75%.
Estimate reading and speaking time from any text.
Compare two texts line by line and spot changes.
Pick a random name, option or topic from a list.
Create a clean printable checklist from any list.
Split available study hours across your subjects.
Calculate pace and speed from distance and time.
Calculate mean, minimum and maximum for a set of numbers.
Count the days until an exam, assignment or event.
Reverse every character in a block of text.
Reverse the order of words while keeping each word intact.
Delete blank lines from pasted text.
Sort lines alphabetically from A to Z or Z to A.
Convert text into clean sentence case.
Find the most frequently used words in any text.
Count how often each character appears.
Extract email addresses from messy text.
Extract web links from pasted text.
Strip HTML tags and keep readable text.
Encode or decode text with ROT13.
Convert text into 8-bit binary values.
Convert binary bytes back into readable text.
Convert characters into ASCII code points.
Convert ASCII numbers into readable characters.
Clean repeated spaces, tabs and blank lines.
Remove repeated words while preserving order.
Randomly shuffle words for games and exercises.
Calculate rectangle area and perimeter.
Calculate circle area and circumference.
Calculate triangle area from base and height.
Calculate rectangular box volume.
Calculate cylinder volume and surface area.
Calculate speed from distance and time.
Calculate distance from speed and time.
Calculate travel time from distance and speed.
Calculate simple interest and final balance.
Calculate profit, margin and markup.
Calculate selling price from cost and markup.
Estimate units needed to cover fixed costs.
Estimate monthly savings needed to reach a goal.
Estimate trip fuel use and total cost.
Estimate appliance electricity cost.
Scale width and height while preserving aspect ratio.
Calculate image print resolution in dots per inch.
Split study time across days and subjects.
Calculate an average from several exam scores.
See how much of a semester has passed.
Calculate words per minute and accuracy.
Estimate the staff cost of a meeting.
Convert bytes, KB, MB, GB and TB.
Convert mm, cm, m, km, inches, feet, yards and miles.
Convert mg, g, kg, ounces and pounds.
Convert m/s, km/h, mph and knots.
Convert square meters, hectares, acres and square feet.
Convert liters, milliliters, gallons and cups.
Convert pascals, bar, PSI and atmospheres.
Convert joules, calories and kilowatt-hours.
Convert degrees, radians and gradians.
Convert decimal, binary, octal and hexadecimal.
Convert numbers to Roman numerals and back.
Convert bps, Kbps, Mbps and Gbps.
Convert seconds, minutes, hours, days and weeks.
Convert Celsius, Fahrenheit and Kelvin.
Convert teaspoons, tablespoons, cups and milliliters.
Generate random integers within a chosen range.
Generate secure numeric PIN codes.
Flip one or many virtual coins.
Roll standard or custom-sided dice.
Split a list of names into balanced random teams.
Generate simple username ideas from keywords.
Generate memorable multi-word passphrases.
Generate random HEX and RGB colors.
Create ready-to-copy linear gradients.
Create and download a custom placeholder image.
Randomly choose the next study topic from your list.
Get a quick randomized yes or no answer.
Remove repeated lines while preserving their original order.
Count total, non-empty and unique lines in pasted text.
Extract integers, decimals and signed numbers from any text.
Find and list unique hashtags from social posts or notes.
Remove common Markdown formatting and keep readable text.
Escape or clean text for safe use inside JSON strings.
Create clean initials from names, companies or phrases.
Turn a list of topics into a simple timed meeting agenda.
Calculate percentage increase or decrease between two values.
Calculate the final price and total savings after a discount.
Calculate return on investment from cost and final value.
Calculate commission earnings and remaining revenue.
Estimate an hourly rate from salary, workweeks and weekly hours.
Estimate an affordable monthly rent from income and a target ratio.
Estimate download time from file size and connection speed.
Estimate a simple daily water target from body weight.
Split a daily calorie target across meals and snacks.
Convert pixels and rem values using a chosen root font size.
Convert hertz, kilohertz, megahertz and gigahertz.
Convert CSS pixels to physical pixels using device pixel ratio.
Choose one or more random items from a pasted list.
Generate random dates for testing, planning or examples.
Choose a quick break activity from your own list.