Powerful features, zero friction
Everything you need to be productive, in one unified platform.
Document & PDF tools
Merge, split, rotate and analyze PDFs right in your browser.
Image tools
Resize, compress, crop, convert and watermark images instantly.
Developer tools
Formatters, encoders, hashers, generators and API testing.
Calculators
Finance, health, math and everyday calculators.
Unit converters
Convert length, weight, currency, data and dozens more.
AI chat & writing
Threaded AI assistant plus writing, coding and research helpers.
OCR & analysis
Extract text from images and analyze documents with AI.
Productivity
Notes, tasks, pomodoro, password generation and more.
How each part of the toolkit works
Rather than a list of buttons, here is what actually happens inside each category, where the common failure points are, and the habits that produce better results — useful whether or not you use these particular tools.
Documents and PDFs
PDF work is structural, not visual. Merging copies the page objects of several files into one container, splitting copies out only the pages you selected, and organising rewrites the page catalogue. Because none of these operations re-render the document, text stays selectable, embedded fonts stay embedded and vector artwork stays sharp at any zoom. Conversion to Word, Excel or PowerPoint is different: it reconstructs intent from geometry, so text-based sources convert cleanly while heavily designed layouts and scanned pages need a review pass.
- Page ranges are inclusive and one-indexed: 1-3 is three pages.
- Compress once at the end rather than after each step.
- If you cannot select text in the source, run OCR before converting.
Images and media
Almost every oversized image is oversized because of its dimensions rather than its compression setting. Resizing to the largest size an image will ever be displayed at typically removes the majority of the file weight with no visible loss at all, and only then does quality tuning matter. Photographs belong in JPEG or WebP at quality 75-85; screenshots, logos and anything containing text belong in PNG or high-quality WebP, where lossy artefacts show up first along sharp edges.
- Compare original and result at 100% zoom, not as thumbnails.
- WebP is typically 25-35% smaller than JPEG at matched quality.
- Strip metadata before publishing photos taken on a phone.
Calculators and converters
The calculators cover the arithmetic people actually repeat: loan and EMI schedules, GST and VAT in both directions, compound investment growth, BMI and age, and programmer conversions between binary, octal, decimal and hexadecimal. The unit converters share one engine across length, weight, area, volume, speed, temperature and digital storage, so behaviour and precision are consistent no matter which category you open.
- Loan schedules assume a fixed rate; re-run when the rate changes.
- Tax tools work both ways — add tax to net or extract it from gross.
- Temperature is an offset scale, so it uses its own conversion path.
Developer utilities
Formatters for JSON, XML and SQL, encoders for Base64 and URLs, hash generators from SHA-1 to SHA-512, a JWT decoder, a regex tester, UUID generation, colour tooling, minifiers and a browser-based API tester. Everything runs locally, which matters more here than anywhere else: pasting a production token into a remote decoder is a credential disclosure, while decoding it in your own tab is not.
- The JWT decoder reads claims only; it does not verify signatures.
- Hashes are one-way — they identify, they do not encrypt.
- The API tester is subject to the same CORS rules as any web page.
AI assistants
The AI features cover threaded chat plus focused assistants for writing, rewriting, summarising, translating and code explanation. They are strongest when they transform material you supply and weakest when asked to recall specifics they were never given, so the reliable pattern is to paste your source text in and ask for a rewrite rather than asking the model to remember facts. Unlike the file tools, AI features require a server, because the models are far too large to run in a browser tab.
- Name the audience, tone and length in your brief.
- Verify figures, dates and negations against the source.
- Never paste credentials, customer data or confidential material.
Privacy model
The document, image, media and developer tools process files inside your browser using WebAssembly, so the file is read from disk by the page, transformed in memory and written back as a download without ever being uploaded. You can verify that claim yourself: open developer tools, watch the Network tab while you run an operation, and confirm there is no outbound request the size of your file. AI features are the deliberate exception and are always labelled as such.
- Local tools keep working after the page has loaded, even offline.
- First run downloads the processing engine; later runs are cached.
- Use local tools for contracts, records and identity documents.