What is LensUp?
LensUp is a ### free online document scanner that transforms photos taken with your phone or tablet into clean, printable PDFs. All processing happens locally in your browser, so your files never leave your device. Whether you need to scan receipts, create passport photos, or compress documents to meet upload limits, LensUp provides a fast, private, and watermark‑free solution.
Features
-
On‑device scanning – No uploads, no cloud storage, complete privacy.
-
Automatic de‑shadow & perspective correction – Turns uneven lighting into a crisp, flat scan.
-
Multiple export formats – PDF, JPG, PNG with lossless PNG option.
-
Customizable compression – Target sizes such as 200 KB, 500 KB, or 1 MB for form uploads.
-
Built‑in passport photo and ID‑card layouts – Crop to 35 × 45 mm, add front & back on one A4 sheet.
-
Watermark & signature tools – Add text, image watermarks, or transparent PNG stamps.
-
Multi‑page PDF creation – Merge several photos into a single ordered PDF.
-
Language support – Interface available in 20+ languages, including English, Español, 中文, and العربية.
-
Free & unlimited – No subscription, no hidden fees, no watermarks.
How to Use LensUp
-
Capture or upload a photo of your document (or select multiple images).
-
Edit the scan:
- Drag corners to crop, straighten, or fix perspective.
- Apply scan effects: Grayscale, De‑shadow, Color Fade, etc.
-
Choose export settings:
- Select paper size (A4, Letter), layout (single, 2‑up, 4‑up, ID‑card).
- Set compression target (e.g., 200 KB).
- Add optional watermarks or signatures.
-
Export the result as a PDF, JPG, or PNG and download it instantly.
All steps run directly in your browser, ensuring your data stays on your device.
Price
LensUp is completely free.
- No subscription, no hidden costs.
- Unlimited scans and exports.
- No watermarks on any output.
Helpful Tips
-
Use good lighting: Even, diffused light reduces the need for heavy de‑shadow processing.
-
Hold the camera steady: A stable shot minimizes blur and improves OCR accuracy.
-
Crop tightly: Remove excess background before compression to stay under size limits.
-
Choose the right layout: For ID cards, select the “ID‑card” layout to fit front and back on one sheet.
-
Check the preview: LensUp shows a real‑time size estimate; adjust compression if the target isn’t met.
-
Save a copy: After exporting, keep the original photo in case you need to re‑edit later.
Frequently Asked Questions
Q: How does LensUp keep my documents private?
A: All image processing occurs locally in your browser using the HTML5 File and Canvas APIs. No files are uploaded to a server, and no account is required.
Q: Can I scan documents without a physical scanner?
A: Yes. Simply photograph the document with your phone or tablet, then use LensUp to crop, straighten, and convert it to a PDF.
Q: Is there any watermark on the exported files?
A: No. LensUp is completely watermark‑free, even on the free version.
Q: What if my file can’t be compressed to the target size?
A: LensUp will compress as much as possible and display a warning if the desired limit cannot be reached, allowing you to adjust settings manually.
Q: Does LensUp work on all devices?
A: It runs on any modern browser (Chrome, Firefox, Edge, Safari) on phones, tablets, and computers.
Q: Are there limits on the number of pages per PDF?
A: There is no hard limit; you can merge as many pages as your device’s memory can handle.
Q: Can I create passport photos directly?
A: Yes. Use the “Passport photo” tool to crop to 35 × 45 mm and export on an A4 sheet with the required background color.
Q: Is LensUp compatible with form upload requirements?
A: Absolutely. You can set exact compression targets (e.g., 200 KB) and layout options to meet most online form specifications.