LensUp

Overview

LensUp is a free online document scanner: snap a paper document with your phone, then crop, straighten, de-shadow and export a printable scanned PDF right in your browser—no app to install, no sign-up, no watermark. Everything is processed on-device, so files never leave your machine.

Beyond photo-to-PDF scanning, LensUp offers cam-scan, light-even-out, pen-mark fading, and manual corner-drag straightening, plus compress-to-a-target-size (e.g. 200 KB), resize in cm, image-to-JPG, passport photo, ID-card front/back layout, and Photo/PDF/Word/EPUB to Markdown—all in one focused toolbox, available in 20 languages.

Core capabilities

Photo to PDF

crop, straighten and de-shadow a phone shot, export a printable scanned PDF

On-device only

all image processing runs locally in the browser, files never leave your device

Free, no watermark, no sign-up

no app install, no account, completely free and watermark-free

Scan enhancement

even out lighting, fade colored pen marks, hand-drag four corners to flatten skewed pages

Compress & resize

squeeze toward a target size like 200 KB, or set exact size in cm/DPI

Markdown conversion

turn Photo, PDF, Word and EPUB into editable Markdown

ID tools

35x45 mm passport photo, ID front/back on A4, image-to-JPG

Use cases

Snap a contract, homework or receipt with a phone and quickly make a clean printable scanned PDF

Squeeze an ID/photo to 200 KB or set exact cm size for a registration/upload form

Extract a paper-photo or PDF into Markdown for easy editing and organization