For students
The free study toolkit students actually use
PDFs, notes, assignments, and quick math — all in one browser-based suite. Works on school laptops with no admin rights, respects assignment portal size limits, and never uploads your files.
Assignments & PDFs
Merge, split, compress, and rotate the PDFs your assignment portal expects.
Merge PDF
Combine multiple PDFs into one file in any order, fully in your browser.
Split PDF
Split a PDF into single pages or custom page ranges without uploading.
Compress PDF
Shrink PDF file size by re-serializing with object streams and stripping metadata.
Rotate PDF
Rotate one, several, or all pages of a PDF by 90°, 180°, or 270°.
JPG to PDF
Combine JPG or PNG images into a single PDF, with fit-to-image or A4/Letter pages.
Protect PDF
Add a password and printing/copy/edit permissions to a PDF in your browser.
Notes & study
Turn handwritten notes into searchable text and clean up study material.
PDF OCR
Extract text from scanned PDFs with browser-based OCR in 10+ languages.
PDF to Word
Extract a PDF's text into an editable .doc Word document.
Word Counter
Count words, characters, sentences, paragraphs and reading time instantly.
Readability Checker
Measure Flesch reading ease and US grade level for any content.
Text Sorter
Sort lines A→Z, by length, numerically, randomly, with optional dedupe.
Duplicate Line Remover
Remove duplicate lines with optional trim and case-insensitive matching.
Photos & scans
Photograph pages of notes, resize IDs for online forms, and share cleanly.
Image Compressor
Reduce image file size without losing visible quality.
Image Resizer
Resize images to exact pixel dimensions or by percentage.
Image Converter
Convert between PNG, JPG, and WebP formats instantly.
OCR Image to Text
Extract text from JPG, PNG, or scanned images with browser-based OCR in 13+ languages.
Passport Photo Maker
Crop and resize photos to passport specifications at 300 DPI for the US, UK, EU, India and more.
Crop Image
Crop images to any aspect ratio or freeform selection.
AI writing help
Draft essays, rewrite paragraphs, and generate cover letters for internships.
AI Blog Generator
Generate full Markdown blog posts on any topic with tone, length and audience controls.
AI Article Rewriter
Rewrite any article in a clearer, simpler or more SEO-friendly style.
AI Email Writer
Draft polished emails for any recipient, purpose and tone.
AI Cover Letter Generator
Write a tailored cover letter for any role and company in under a minute.
Quick calculators
Money, time, and math shortcuts you'll actually use in a semester.
Percentage Calculator
Compute X% of Y, percentage of, and percentage change.
Age Calculator
Calculate your exact age in years, months, days, and total days.
Date Difference Calculator
Calculate days, weeks, hours and minutes between two dates.
Loan Calculator
Plan loans with a full monthly amortization breakdown.
Compound Interest Calculator
Compute growth with annual, quarterly, monthly or daily compounding.
Popular workflows for Students
Ready-made recipes that pair a tool with the exact context students use every day.
Merge PDF on Mac
combine PDFs on macOS without installing Adobe Acrobat or paying for a Pro subscription
Compress PDF for email attachments
shrink a PDF so it fits under Gmail, Outlook, or corporate mail size limits
Image Compressor for Instagram
compress photos for Instagram feed and stories without losing the crispness the algorithm rewards
Guides worth reading
Playbooks that pair with the tools above.
Frequently asked questions
Are these tools safe to use on a school-issued laptop?+
Yes. Everything runs in the browser — no installer, no admin rights, no browser extension. If your school allows Chrome, Edge, or Firefox, it allows ToolStop.
Can I upload my assignment PDF to a portal that has a 1 MB limit?+
Use Compress PDF first. Scans usually drop 60–80% in size; text-only documents drop 20–30%. If you're still over the limit, split the PDF or scan in grayscale at 200 DPI.
Do the AI writing tools count as plagiarism?+
Any AI-generated text needs to be treated the way your school treats AI. Use the tools to brainstorm outlines, rewrite awkward sentences, and check readability — not to submit whole essays.
Can I OCR my handwritten lecture notes?+
OCR works best on printed text. Handwriting recognition depends on how neat your writing is — expect solid results with block letters and mixed results with cursive.
Do these tools work offline?+
File-based tools work in a modern browser as long as the page has already loaded. AI writing tools need internet because they call a language model.