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Quick answers about our free tools, your privacy, file sizes and the Telugu converters.
SADH.IO is a collection of free online tools for everyday digital work: PDF tools, image tools, Telugu journalist tools and utility calculators. Each tool has a step-by-step guide in our Blog.
Yes. All tools are free to use. There is no sign-in, no watermark on your results and no limit on how many times you can use a tool. We may show ads on some pages to cover hosting costs.
No. Open the tool in your browser, use it and close it. Nothing has to be installed.
Current versions of Chrome, Edge, Firefox and Safari on Windows, macOS, Android and iPhone. Chrome or Edge on a computer gives the best speed for large files.
No. The tools run inside your browser, so your files are processed on your own device. Please see How It Works for a simple explanation.
Because files are not uploaded, these documents are not copied to our servers. As good practice, use a trusted device, avoid public computers for sensitive documents, and delete downloaded copies you no longer need.
We use basic analytics to understand which pages are useful, and we may show advertising. Details are in the Cookie Policy and Privacy Policy.
That tool uses the speech recognition built into your browser. Depending on the browser, audio may be processed by the browser vendor’s service. SADH.IO does not receive or store your recordings.
We do not set a fixed limit. The practical limit is the memory of your device. If a very large file fails, try a computer instead of a phone, close other tabs, or split the work into smaller parts.
Most tasks finish in seconds. Large PDFs, OCR and PDF to Word take longer because the work is done on your device.
Compress PDF re-encodes the images inside the file. Text stays sharp and selectable. Choose a lighter level if you need the best picture quality, or a stronger level if you need the smallest file.
It rebuilds headings, paragraphs, bullet points, tables and pictures as real Word content. Complex layouts with many columns or text boxes may need small adjustments afterwards. Scanned PDFs need OCR first.
Yes. All pages are designed for phones and tablets. For big files or many pages, a computer is faster.
Allow downloads for sadh.io in your browser, turn off pop-up blocking for this site, and try again. More fixes are on the Help Center.
Unicode Telugu works in every modern app, website and phone. Non-Unicode text was typed with older fonts and looks correct only when that exact font is installed; otherwise it appears as random English letters. Our converters change one form into the other.
Check that you chose the right direction and pasted the full text. Text copied from some PDFs already has broken encoding and cannot be converted reliably. Try typing a short sample first to confirm the tool is set correctly.
Yes, they are designed for journalists and DTP operators. Always proofread important text after conversion, as no automatic converter can be perfect for every font and every special character.
The English–Telugu tools and the text translator are built for everyday text. For legal or official documents please have a person check the translation.
Calculators such as EMI, GST, age and percentage use standard formulas. Results are for information and planning. For loans, tax or legal decisions, confirm the numbers with your bank or advisor.
No. Values you type into calculators stay in your browser and are not saved by us.
Please do. Use the Contact page, tell us the tool you need and how you would use it. Many of our tools started as a visitor’s request.