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Pick a tool, add your file, and download the result. All the work happens in your browser, so your files stay with you.
Choose from the menu at the top, or open All Tools and use the search box. Popular tools are listed first on every category page.
Drag a file onto the page, tap “Choose file”, or paste your text. Nothing needs to be installed and you never have to create an account.
Press the action button, wait a moment, and download the result. Most tools finish in a few seconds, even for large files.
Most online tools send your file to a server, process it there and send it back. SADH.IO works differently. The tools are small programs written in JavaScript that your browser downloads together with the page. When you choose a file, your browser itself does the work: merging the pages, shrinking the image, converting the text. The file is read from your device’s memory and the result is created on your device.
This has three practical benefits. Your private documents, such as ID cards, certificates, bank statements and photos, are not copied to our servers. The tools keep working even on a slow connection once the page has loaded. And because there is no upload and download of large files, the result is usually faster.
Your browser reads the PDF, works on its pages and builds a new file. Merge, split, rotate, reorder, protect, sign and compress all follow this pattern. Compression only re-encodes the pictures inside the PDF, so text stays sharp and selectable.
Images are drawn on a hidden canvas inside the page, resized, cropped, converted or compressed there, and exported again as JPG, PNG or WebP. Quality sliders let you choose between smaller size and sharper detail.
Telugu text converters map each character from one encoding to another using built-in tables, on the text you paste. Word counters, translators and news-card makers work on the text and images you provide.
Calculators, converters and generators such as EMI, age, GST, QR codes and unit conversion run entirely as formulas in the page. They need no data from our side to give you a result.
SADH.IO is free to use, with no hidden limits on the number of files and no watermark added to your results. To cover hosting costs we may show advertising on some pages. Ads are placed around the content and never inside the tool area, and the tools themselves never depend on them. You can read how cookies and advertising work in our Cookie Policy.