Free tool guides
Step-by-step how-tos for everyday PDF, image, AI and audio tasks, plus maths, grades, study and classroom guides — every guide uses a free tool that runs entirely in your browser. No upload, no signup, no watermarks.
PDF guides
Merge PDFs without uploading
Combine PDF files privately — without sending them to a server. A step-by-step guide using a free, 100% in-browser tool.
Read the guide →OCR a scanned PDF privately
Make a scanned PDF searchable with OCR — without uploading it. Uses a free, on-device tool.
Read the guide →Compress a PDF for free
Shrink PDF file size right in your browser — no upload, no signup, no watermark.
Read the guide →Split a PDF for free
Split a PDF into separate pages or extract a page range for free, in your browser.
Read the guide →Edit a PDF free online
Add text, notes and annotations to a PDF for free in your browser — no signup, no upload.
Read the guide →Convert PDF to Word free
Turn a PDF into an editable Word document for free in your browser — no email required.
Read the guide →Convert PDF to JPG/PNG free
Convert PDF pages to JPG or PNG images for free in your browser — private, step by step.
Read the guide →Free client-side PDF tools (2026)
A guide to free PDF tools that process files in your browser — no upload, no signup, no limits — and why that matters.
Read the guide →Image guides
Compress images without quality loss
Compress JPG/PNG/WebP images without visible quality loss — without uploading them.
Read the guide →Resize an image free online
Resize an image to exact dimensions for free in your browser — no upload, no quality loss.
Read the guide →Convert an image to text (OCR)
Extract text from an image with OCR for free in your browser — no upload, no signup.
Read the guide →AI & audio guides
10 best free AI tools, no signup (2026)
The best free AI tools you can use right now with no signup and no API key — image generation, writing, text-to-speech, OCR and more.
Read the guide →Free AI image generator, no signup
Generate images from text with AI for free — no signup, no API key, no daily limit.
Read the guide →Convert text to speech free
Turn text into natural AI voice audio for free — no signup, no API key. Download MP3/WAV.
Read the guide →Remove vocals from a song free
Separate vocals from music to make a karaoke or instrumental track for free in your browser.
Read the guide →Maths, grades & study guides
How to calculate GPA and CGPA
Learn how to calculate semester GPA and cumulative CGPA step by step with the credit-weighted formula, a worked example and the mistakes to avoid.
Read the guide →How to calculate a percentage
Learn to find a percentage of a number, what percent one number is of another, percentage change and reverse percentages, with worked examples.
Read the guide →How to calculate a weighted grade
Work out your current class grade from assignment scores and weights. Includes a full syllabus example, unweighted points grading and what to do mid-term.
Read the guide →What do I need on my final exam?
Work out the score you need on your final exam to reach a target grade, from your current grade and the exam's weight, with worked examples and edge cases.
Read the guide →How to calculate attendance percentage
Work out your attendance percentage, how many classes you must attend to reach 75% (or any target) and how many you can still miss, with worked examples.
Read the guide →How to calculate standard deviation
Learn how to calculate standard deviation by hand, the difference between sample and population formulas, and what the result tells you, with a worked example.
Read the guide →How to calculate a z-score
Learn what a z-score is, how to calculate it from a raw score, the mean and standard deviation, and how to turn it into a percentile, with worked examples.
Read the guide →How to add, subtract, multiply and divide fractions
Learn the four rules for fractions and mixed numbers, how to simplify with the greatest common factor, and the mistakes to avoid, with worked examples.
Read the guide →How to find the GCF and LCM
Learn three ways to find the greatest common factor and least common multiple of two or more numbers, with worked examples and where each is used.
Read the guide →How to solve quadratic equations
Solve ax² + bx + c = 0 by factoring or the quadratic formula. Learn the discriminant, irrational and complex roots, the vertex and common mistakes.
Read the guide →How to solve systems of equations
Solve two or three linear equations by substitution, elimination or Cramer's rule, and learn how to spot systems with no solution or infinitely many.
Read the guide →How to find the slope between two points
Learn the slope, distance and midpoint formulas, how to write the equation of a line through two points, and what vertical and horizontal lines look like.
Read the guide →How to count and round significant figures
Learn the rules for counting significant figures, how to round to a set number of sig figs, and how to add, subtract, multiply and divide measurements.
Read the guide →How to do long division
Learn long division step by step: divide, multiply, subtract, bring down. Covers remainders, decimals, repeating decimals and how to check your answer.
Read the guide →How to balance chemical equations
Learn how to balance chemical equations by counting atoms, with a propane example, tips for polyatomic ions and when to use the algebra method.
Read the guide →How to cite sources in APA and MLA
Learn how to format APA 7th and MLA 9th edition citations for books, journal articles and web pages, with side-by-side examples and in-text citations.
Read the guide →Teacher & classroom guides
How to pick random names and make fair teams
Learn how to pick a random name or split a class into fair teams, why some shortcuts are biased, and how a true fair shuffle works.
Read the guide →How to use the Pomodoro technique and a classroom timer
Learn the Pomodoro technique (25 minutes of focus, 5 of rest), how to adapt it, and how to use a big-screen countdown in class and exams.
Read the guide →How to make crosswords, word searches and bingo for class
Make printable crosswords, word searches and bingo cards from your own vocabulary list: how to choose words, set difficulty and use them in class.
Read the guide →How to grade a test quickly with a score chart
Grade a stack of tests fast: build a printable chart of percentage and letter grade for every score, count wrong answers and handle partial credit.
Read the guide →Writing, time & everyday guides
How to count words and characters
Learn how words, characters, sentences and reading time are counted, why tools disagree, and the character limits for X, SEO titles, SMS and more.
Read the guide →How to calculate hours worked
Learn how to add up hours worked, subtract unpaid breaks, handle overnight shifts and convert minutes to decimal hours for payroll, with worked examples.
Read the guide →How to calculate exact age
Learn how to calculate someone's exact age on any date, how leap-day birthdays and short months are handled, and how to find days until the next birthday.
Read the guide →How to test and improve your typing speed
Learn how typing speed (WPM) is calculated, the difference between gross and net WPM, and practical ways to type faster and more accurately.
Read the guide →How to make a barcode
Learn which barcode type to use, how check digits work, how to generate a Code 128, EAN-13 or UPC-A barcode and print it so it scans.
Read the guide →Title case, sentence case and other text cases
Learn the rules for title case, sentence case, camelCase, snake_case and kebab-case, which words stay lowercase in headlines and when to use each style.
Read the guide →Looking for the tools themselves? Browse all 50+ free tools or jump to a category: PDF, Image, AI, Media, Business, Utility.