Free tools for students

43 tools that each do one job and do it properly. No account, no email, no limits, and nothing you type or open is sent anywhere. They all run in your browser, which is also why they are free to keep running.

Study calculators

Attendance, final grades, weighted GPA, study planning, focus timing, and notes turned into flashcards.

Attendance calculatorSet your own threshold, enter classes attended and held, and get both answers at once: the classes you can still miss, and the unbroken run you would need to climb back above the line.Open the tool Final grade calculatorGet the score your final exam has to earn for the overall grade you want, plus the best grade still reachable and the grade already locked in whatever happens in the exam hall.Open the tool CGPA to percentage converterConvert a 10-point CGPA, a 4-point GPA and a percentage in any direction. Choose between the CBSE multiply by 9.5 rule and the other conventions in use, and see the formula applied.Open the tool Text to flashcardsPaste notes written as Q and A lines, tabs, dashes, colons or alternating lines. Edit the parsed cards, then export to CSV, to Anki, or to your printer.Open the tool GPA calculatorCalculate a credit-weighted GPA on a 4.0, 5.0 or 10.0 scale and see every course contribution.Open the tool Pomodoro study timerRun focused study and break intervals with adjustable lengths and a visible session count.Open the tool Exam study plannerTurn an exam date, topic count and available study time into a realistic daily revision target.Open the tool

Everyday calculators

Age, percentages, marks, SGPA and CGPA, and the score negative marking actually leaves you.

Age calculatorExact age in years, months and days, plus total days and the countdown to your next birthday.Open the tool Percentage calculatorWhat percent is X of Y, what is X% of Y, and the increase or decrease between two numbers.Open the tool Marks percentage calculatorAdd every subject with its own maximum marks and get the total, the percentage and a per-subject breakdown.Open the tool SGPA to CGPA calculatorCombine semester SGPAs into a credit-weighted CGPA, or find the SGPA you still need.Open the tool Negative marking calculatorProjected score and accuracy from your attempts, with the penalty for wrong answers applied.Open the tool Unit converterLength, weight, temperature and area, converted the moment you type, with the whole table shown.Open the tool

Image tools

Resize, crop and hit the exact pixel and file size an application form asks for.

Exam photo resizerResize a photo or signature to exact pixels and land the file inside the KB range an application form demands.Open the tool Passport photo makerCrop to 35 x 45 mm, 2 x 2 in and other standard passport sizes at print resolution.Open the tool Image resizerResize by pixels or by percentage, with the aspect ratio locked or free, and see the file size before you download.Open the tool Image cropperCrop to 1:1, 4:3, 16:9 or any ratio you type in, straight in the browser.Open the tool Circle cropCut a photo into a circle for a profile picture, with the corners saved genuinely transparent.Open the tool Watermark imagePut text or your own logo over a picture, with the position, size, angle, colour and opacity you choose.Open the tool

PDF tools

Merge, split, rotate and convert PDFs on your own device, without uploading them.

Merge PDFCombine several PDFs into one file, and drag them into the order you want before you save.Open the tool Split PDFPull out a page range as its own file, or break a PDF into one file per page.Open the tool Rotate PDFTurn sideways or upside down pages by 90, 180 or 270 degrees, one page or all of them.Open the tool Delete PDF pagesPick the pages you do not want from thumbnails and save a PDF without them.Open the tool PDF to imagesRender every page to a PNG or JPG at the size you choose, then save them individually or as a zip.Open the tool Images to PDFPut JPGs and PNGs into a single PDF, with the page size, orientation and margin you pick.Open the tool PDF text extractorCopy the selectable text out of a PDF, or save the whole thing as a .txt file.Open the tool Add page numbers to PDFStamp numbers onto the pages, starting where you choose, the right way up even on rotated scans.Open the tool Watermark PDFStamp draft, sample or confidential across the pages, at the angle, size and opacity you pick.Open the tool

File and text converters

Change a file from one format into another, and count, compare or reshape what you have written.

Compress image to sizeName a target file size and get the image compressed until it fits under it.Open the tool Image converterConvert PNG, JPG and WebP in any direction, without uploading the file anywhere.Open the tool Word counterLive words, characters, sentences, paragraphs and reading time.Open the tool QR code generatorTurn any text or link into a QR code and download it as PNG or SVG.Open the tool Favicon generatorOne image in, every favicon size out, as a zip or as single files.Open the tool Text to PDFPaste text, pick a page size and font size, download a real PDF.Open the tool Markdown to PDFWrite markdown, see it rendered, then export the formatting to PDF.Open the tool CSV to JSONConvert both ways, with RFC 4180 quoting and a parsed preview table.Open the tool Case converterUPPER, lower, Title, Sentence, camelCase, snake_case and kebab-case.Open the tool Diff checkerCompare two texts line by line and see what was added, removed or changed.Open the tool Password generatorStrong random passwords from your browser's crypto engine, with the entropy in bits.Open the tool JSON formatterBeautify, minify and validate JSON, with the line and column of any error.Open the tool Base64 encoder and decoderEncode and decode text or files, with UTF-8 handled properly for emoji and accents.Open the tool URL encoder and decoderPercent-encode and decode, with encodeURI and encodeURIComponent side by side.Open the tool Lorem ipsum generatorPlaceholder paragraphs, sentences or words, as plain text or as HTML.Open the tool

Why these run in your browser

Every tool on this page is arithmetic, string handling, or work the browser can already do to a file it has open. An attendance percentage is a division. A required final exam score is a rearranged weighted average. Resizing a photo is a canvas draw and an encode. Merging two PDFs is reading the bytes of both and writing new ones.

None of that needs a server, so none of it uses one. Your numbers, your notes and your files stay on your device, the pages work on a slow connection, and there is no usage cap to enforce because there is no cost per use to recover.

Where the AI tools sit

The tools above are deliberately dumb, and that is what makes them reliable. When you need something that has to actually read your material, that is a different job:

One place for the tools and the studying

FORKSAI turns your notes, slides and PDFs into flashcards, quizzes and spaced repetition sessions. The tools on this page stay free either way.

The tool above stays free and needs no account.

Plan your next review session

Use the free student study kit to plan a week of revision, check flashcard quality, and record mistakes from practice questions.

Need a deck first? Turn a lecture PDF into editable flashcards, then follow the active recall guide to practise answering before revealing the back of each card.

Working toward an exam? Build a daily target with the exam study planner, protect the session with the Pomodoro study timer, or check your current result with the weighted GPA calculator.