Free tools
Free Online Tools for Students
Updated 27 September 2026 · 4 min read
Between assignments, applications and exam revision, students run into dozens of small technical jobs: a report that must be a PDF, an essay that must be under 1,500 words, a photo that must be under 500 KB. KitWren puts the tools for all of them in one place — free, with no account, and with PDF and image files processed on your own device. Here they are, organised by what you’re trying to get done.
Open the free Word CounterFor assignments
Hitting the word count
The Word Counter counts words, characters, sentences and paragraphs as you type, and estimates reading time — handy for presentations too. For short-answer boxes with a character limit, use the Character Counter. Pasted a heading in capitals by mistake? The Case Converter fixes it in one click.
Submitting as a PDF
- Word to PDF converts your essay so it looks the same on your marker’s screen.
- Add page numbers to long reports.
- Merge PDF joins a cover sheet, report and appendices into one file.
- Compress PDF gets big, image-heavy reports under upload limits.
- JPG to PDF turns photos of handwritten work into a single document.
Images for presentations and posters
- Crop and resize screenshots and photos.
- Convert iPhone HEIC photos to JPG so they insert into any software.
- Remove a plain background from product or object photos.
- Compress images so slide decks stay small enough to email.
| Example: a lab report | Tool |
|---|---|
| Check the discussion is within 800 words | Word Counter |
| Convert the Word file to PDF | Word to PDF |
| Add photos of your hand-drawn graphs at the end | JPG to PDF + Merge PDF |
| Number the pages | Add page numbers |
| Get under the 10 MB upload limit | Compress PDF |
For applications
Internships, scholarships, exchange programs and part-time jobs all come with forms and document uploads.
- Fill PDF form and Sign PDF — complete and sign without printing.
- Passport Photo Maker — ID photos for Australia, the UK, EU, US, Canada, India, China and New Zealand, with a 6×4 print sheet.
- Image Resizer and Image Compressor — meet “under 200 KB” photo rules.
- Merge PDF — combine transcripts, references and certificates into one upload.
For study
Maths and money
- Percentage Calculator — marks, discounts and percentage change, with the working shown.
- Average Calculator — mean, median and mode.
- Unit converters — 123 of them, from cm to feet to Celsius to Fahrenheit, covering length, weight, temperature, area, volume, speed, pressure, energy, power, data and more.
- Compound Interest Calculator — for finance subjects and your own savings.
- Days between dates — count down to exams and deadlines.
English
If English isn’t your first language — or you’re aiming for a higher IELTS score — KitWren’s learning section is free end to end: a 30-question English level test, full courses from A1 to C2, IELTS and TOEFL preparation, a grammar library, a vocabulary trainer, and listening, reading, writing and speaking practice.
For group projects
- Each person exports their section to PDF, then one person combines them in order with Merge PDF — far less painful than merging Word files with different styles.
- Use Reorder PDF pages if a section lands in the wrong place, and Add page numbers once the order is final.
- Check the combined word count by pasting each section into the Word Counter before the final export.
Before you submit: a quick checklist
- Is the word count inside the limit, including or excluding references as your course requires?
- Is the file the format asked for — usually PDF or Word?
- Are the pages in order, the right way up and numbered?
- Is the file under the upload size limit?
- Does the file name follow your course’s naming rules?
- Have you opened the final file once to check it looks right?
Why students use KitWren
- Free, with no account — nothing to remember, nothing to cancel.
- Private — PDF and image tools work on your device, so assignments and ID documents aren’t uploaded.
- Works on school devices — runs in the browser on laptops, Chromebooks, tablets and phones, with nothing to install.
- No watermarks on anything you download.