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Frequently Asked Questions
Everything you need to know about ZipPDF. Can't find your answer? Contact our support team.
ZipPDF is a free Android application developed by TechieHit Solutions that compresses PDF files directly on your device. Unlike web-based tools, ZipPDF works 100% offline — your files never leave your phone. No cloud, no account, no internet required for compression.
Yes, ZipPDF is completely free to download and use. There are no in-app purchases, no subscriptions, and no premium tiers. All features are available for free to every user. We believe privacy tools should be accessible to everyone.
Absolutely not. ZipPDF is built as a 100% offline application. Your PDF files are processed entirely on your device using local algorithms. We have no servers that receive your files. Your documents never leave your phone — this is the core promise of ZipPDF.
No internet connection is required for PDF compression. ZipPDF works perfectly in airplane mode, without Wi-Fi, or without any mobile data. The entire compression process happens locally on your Android device. Internet is only used when you choose to download an app update from the Google Play Store.
No. ZipPDF does not request broad storage permission (READ_EXTERNAL_STORAGE). Instead, it uses Android's modern Storage Access Framework (SAF) and file picker. This means you choose exactly which file to share with the app — your other files are never accessible to ZipPDF.
Yes. Since ZipPDF collects no data and performs all processing on-device, there is no data of yours stored anywhere that could be compromised. Your PDF files remain on your device under your device's own security protections. We also do not integrate any third-party analytics or tracking SDKs.
Yes. ZipPDF is designed to handle PDF files of various sizes. Performance depends on your device's processing power, but most users report excellent compression speeds even for large documents. The app uses optimized algorithms to maximize both speed and compression ratio.
ZipPDF supports Android 7.0 (Nougat) and above. This covers the vast majority of Android devices currently in use. The app is optimized for modern Android versions and takes advantage of the latest Android APIs for better performance and security.
Online PDF compressors require you to upload your PDF to their servers — servers you don't control, run by companies whose privacy practices may be unknown. ZipPDF eliminates this risk entirely by doing all compression on your device. Your confidential documents — financial records, legal papers, medical documents — stay private.
Compression results vary depending on the PDF content. PDFs with many images or graphics typically achieve the best compression (up to 90% size reduction). Text-heavy PDFs may compress less. On average, users report 60–85% size reduction. ZipPDF will show you the before and after file sizes.
ZipPDF uses intelligent compression algorithms that aim to minimize file size while preserving readability. For most documents, the visual quality is maintained at a perfectly readable level. If you need to share a PDF by email or WhatsApp (which have attachment size limits), ZipPDF is ideal.
You can reach our team at support@techiehit.com. We aim to respond within 48 hours on business days. You can also visit our contact page on this website. We welcome bug reports, feature requests, and general feedback.
Still have questions?
Our support team is here to help. We typically respond within 48 hours.
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