StudyKit · 44 free browser tools
Clear work, without the upload.
Small tools for text, images, PDFs, QR codes, and study. Every one of them runs inside your browser, so the file you open never leaves your machine.
- No account
- 44 of 44 never upload
- Free, no limits
Most used
Where most people start
Ranked by how often each tool’s page has been opened.
Most visited
Ranked by how often each tool's page has been opened.
- ScreenshotCapture a tab, a window, a screen, or a selected area as a PNG.
- Image CompressorMake a picture smaller for email or the web, and see the saving.
- Word CounterCount words, characters, sentences, and paragraphs as you type.
- Text RewriterRewrite a paragraph so the wording reads differently without changing the meaning.
- FlashcardsMake flashcards from your notes and study them with active recall.
- Split PDFPull pages or page ranges out of a PDF into separate documents, in your browser.
All 44 tools
Pick a category, or search by name.
- Text RewriterRewrite a paragraph so the wording reads differently without changing the meaning.
- Prompt BuilderTurn a lazy prompt into a proper brief with a role, context, format and rules, for ChatGPT, Claude, Midjourney or anything else.
- Writing Pattern AnalyserMeasure sentence length variation, vocabulary range, repetition and passive voice in any text.
- Invisible Character CleanerFind and remove zero-width characters, bidirectional controls and soft hyphens from copied text.
- Alphabetical Order ToolSort any list of words or names from A to Z or Z to A, in your browser.
- Punctuation FixerRepair doubled spaces and repeated punctuation in copied text.
- Case ConverterSwitch text between sentence case, lower case, and UPPER CASE.
- Citation & Bibliography GeneratorFormat a reference in APA, MLA, Chicago or Harvard, and export it as BibTeX.
- Word CounterCount words, characters, sentences, and paragraphs as you type.
- Reading TimeEstimate how long a piece of writing takes to read or to say aloud.
- Keyword DensitySee which words a text leans on most, and how often.
- Image CompressorMake a picture smaller for email or the web, and see the saving.
- Text from ImagePull typed words out of a photo or a scan so you can copy them.
- Resize ImageResize a picture to the sizes social platforms ask for.
- Aspect RatioChange a picture's shape without stretching it.
- WebP to JPG or PNGConvert a WebP picture into a format everything else accepts.
- Blur & PixelateBlur a picture to hide a face, a plate number, or a screen.
- Colour PickerPick a colour from a picture and get its hex and RGB values.
- Add a WatermarkPut your own mark across a picture to show it is yours.
- Background RemoverCut a subject out of a photo and download it with a transparent background.
- Redact ImageCover personal details in a picture and clear its saved location data.
- Colour Palette GeneratorPull the colours out of a picture, with the contrast of each pair worked out.
- Word to PDFTurn a Word document into a PDF that keeps the original layout.
- Split PDFPull pages or page ranges out of a PDF into separate documents, in your browser.
- Merge PDFCombine several PDFs into one file, in the order you choose.
- PDF EditorReorder, rotate, duplicate, or delete pages, then download the file.
- PDF to EPUBTurn a text-based PDF into an EPUB that reflows on an e-reader.
- URL QR CodeTurn a web address into a code anyone with a phone can scan.
- Text QR CodePut any short piece of text into a scannable code.
- Email QR CodeMake a code that opens a new message to an address.
- Wi-Fi QR CodeMake a code that joins someone to a network without typing it.
- QR Code ScannerRead a code with the camera and see what it holds.
- GPA CalculatorWork out a weighted grade point average from credits and grades.
- Percentage CalculatorWork out percentages, differences, and increases.
- ScreenshotCapture a tab, a window, a screen, or a selected area as a PNG.
- Screen RecorderRecord the screen, with an optional microphone, in your browser.
- Video Auto ClipFind the interesting parts of a video and cut them into separate clips.
- Study PlannerTurn subjects and an exam date into a revision timetable that spreads each subject across the weeks you have.
- Cornell Notes GeneratorLay notes out on the Cornell pattern with a cue column and a summary band, ready to print.
- Quiz GeneratorTurn notes into a self-marking quiz, or print an answer sheet to write on.
- Study Guide BuilderTurn a passage into named guide sections with a check question each, using a model that runs on this server.
- FlashcardsMake flashcards from your notes and study them with active recall.
- Audio CompressorShrink an audio file to MP3, AAC, Opus or FLAC at a bitrate you pick, in seconds.
- Crypto Chart SimulatorPractise reading live crypto charts, or replay history candle by candle, with a simulated balance.
No tool matches that. Try a shorter word, or choose All.
The file
What happens to the file you open
Worth knowing before you pick a tool, because it is the part most sites in this category leave vague.
Step one
You choose a file from your own device
You pick a file from your own device. For 44 of the tools the browser reads it directly and no server ever receives it. are the exceptions: they send the work to a server instead, because it cannot run inside a tab.
Step two
44 of them do the work in your browser
Those 44 run a script on your own machine, which is why a large file takes as long as your computer takes and why there is no upload progress bar. The remaining 0 run on our hardware, which is why they can take files a browser tab would struggle to open.
Step three
You save the result yourself
You get a download you name and keep. Nothing is kept afterwards on either path: the browser tools have nothing to delete, and the server tools delete the upload as soon as the job ends. Anything a crashed process leaves behind is swept within 45 minutes.
The limits
What these tools are honest about
Each tool page says where its own method stops working. The same limits apply across the site.
They measure
A tool reports what it can actually detect
Word counts, reading time, image dimensions, and colour values are exact. Anything involving judgement, like finding the highlight in a video or deciding whether a sentence is clear, is an estimate, and the page for that tool explains how it decides.
They do not judge
Nothing here checks whether a result is correct
These tools cannot verify a fact, a citation, a grade, or an originality score. A rewrite produces different words, not proof of authorship, and a clean scan says nothing about whether an argument holds up.
They are careful
Which is also the trade-off
Because your file never goes to a third party, there is no account to sync across devices, no saved history, and no way to recover a result you closed the tab on. Keep your own copy of anything you want to keep.
Not sure which one you need?
If you would rather pick by task than scroll a list, the services page groups every tool by what you are trying to do, and says where each one stops working.