Being a student means living in a world of PDFs, word limits, group projects, and "please compress this to under 5 MB." It also means being broke. The worst part is that most "free" online tools are actually free trials: they watermark your PDF, cap your file size, or quietly upload your essay to a server you don't control.
This list only includes tools that are genuinely free — no signup, no watermark, no daily limit, and (where it matters) no uploading your files to someone's server. They all live on one site: Tooly, with 53+ free tools in total. Bookmark the ones you need.
The 10 tools every student should bookmark
1. PDF Merger — Combine lecture slides, research PDFs, or your essay chapters into one file. Runs entirely in your browser: no upload, no watermark, no 10-page limit.
2. PDF Compressor — Submission portals love a 2 MB cap. Shrink a scanned 15 MB PDF down to size in seconds, without your professor complaining about blurry pages.
3. Word Counter — "2500 words max." Paste your draft and see words, characters, and estimated reading time update live. Includes the characters-without-spaces count that social media and some assignment portals use.
4. Case Converter — Title Case for your essay heading, UPPERCASE for that one professor's formatting rules, sentence case for your abstract. One click, no retyping.
5. QR Code Generator — Put a QR code on your group-project poster, your CV, or your portfolio. Free, custom colors, no tracking.
6. Image Compressor — That 8 MB photo from your phone? 300 KB, visually identical. Your images never leave your device, which matters when it's a passport scan.
7. Unit Converter — kg↔lb, km↔miles, °C↔°F, liters↔gallons and more. Rescue for physics homework and study-abroad packing.
8. Discount Calculator — "30% off everything" — what does that actually cost? Know before you check out.
9. Password Generator — Generate a strong unique password for each of your student accounts (LMS, library, email). Use a password manager, and stop reusing passwords.
10. Lorem Ipsum Generator — Mock up a report layout, a poster, or a website without waiting for real text. Also handy when you need placeholder copy at 3 AM.
For CS, engineering and design students
If your degree involves code, hardware, or design, add these:
11. JSON Formatter — Paste a minified API response and get a readable, validated tree. Every developer's daily driver.
12. Regex Tester — Live match highlighting while you build and debug patterns for coursework or scripts.
13. Markdown to HTML — Write in Markdown, get clean HTML for your README, lab report, or personal site.
14. HTML Preview — Sandbox a snippet before it goes into your assignment.
15. CSS Minifier & JS Minifier — Shrink your front-end files and learn what "minified" actually means for page speed.
16. YAML ↔ JSON & CSV ↔ JSON — The data-format converters that config files and datasets keep demanding.
17. SHA-256 Generator + Base64 + UUID Generator — Hashing, encoding, and unique IDs. The trio every security or web course uses. These run locally, so you're never hashing keys on a stranger's server.
18. STL to G-code — 3D printing coursework? Slice-ready conversions without installing a desktop slicer just for one print.
19. PSD to PNG — Open that design file from your groupmate who only has Photoshop on a lab PC.
20. Text Diff — Compare two versions of your code or essay and see exactly what changed. The built-in "find the difference" for submissions.
Calculators that rescue homework and life admin
21. Percentage Calculator — "What is 17% of 240?" Done in one field, with the formula shown so you actually learn it.
22. Date Difference Calculator — Days until the exam, days since the assignment was set, days until your rent is due. All of student life is a date difference.
23. Tip Calculator — Split the bill without the awkward group math.
24. Roman Numeral Converter + Number to Words — For humanities formatting rules and writing out amounts on forms.
25. Salary Calculator — The internship offer finally arrived. See the hourly rate and what it means after tax. Also the Age Calculator and BMI Calculator for the standard life-admin checks.
Why "no signup" and "no upload" matter for students
Your essays, CVs, and bank-related documents are private. When a free tool asks you to create an account or upload a file, you're trading your data for a service that probably gets paid by selling access to it. Browser-based tools flip that: the code runs on your device, the file never leaves it, and there's no account because there's nothing to store.
That's the entire reason Tooly exists — 53+ free tools, built to be private by design. If a tool here feels sketchy, the answer is always "don't use it," and if something breaks, there's a real human behind 4toolywork@gmail.com.
Frequently asked questions
Are these student tools really free?
Yes — every tool linked above is free with no signup, no watermark, and no daily limit. Some have paid upgrades (like batch conversion in BankToCSV), but the free tier is genuinely usable, not a teaser.
Do these tools upload my files?
No. Tools that process files — PDF merger, PDF compressor, image compressor, format converters — run entirely in your browser. Your files never leave your device.
Which tool do students use the most?
The PDF merger and word counter are the most-used student tools on Tooly. PDF compressor is the one that saves the most panicked emails to professors.
Is there an app I need to install?
No installs. Every tool works in any modern browser on Windows, macOS, Linux, Chromebook, or your phone.
Can I request a tool for a specific course?
Yes — email 4toolywork@gmail.com. New tools ship regularly and requests are a big part of the roadmap.