LensUp — Free Online Document Scanner

Free in-browser document scanner: photo → clean PDF. Crop, fix perspective, add an optional watermark or signature, and compress. No upload or sign-up.

Crop, adjust contrast, and straighten by hand when you need to — then export a printable A4 PDF, or compress toward the size a form asks for. Files never leave your device.

Take a photo or choose filesAll 11 tools

Scan to PDFDocument scanner: crop a photo, adjust contrast, then make a printable PDF.Passport photo35 × 45 mm crop, white/blue/red, A4 sheet.Compress to a limitToward 200 KB — best effort, real size shown.

Scan to PDFDocument scanner: crop a photo, adjust contrast, then make a printable PDF.Cam scannerUse your camera as a document scanner — no app.Even out lightingReduce uneven light so the page reads flatter.Fade pen marksSoften coloured pen on printed worksheets.Straighten by handDrag the four corners to flatten a skewed shot.

Compress to a limitToward 200 KB — best effort, real size shown.Increase size in KBMeet a form’s minimum file-size floor.Resize in cmSet exact centimetres at the DPI you choose.JPEG → JPGRe-export with the extension strict forms accept.

Passport photoNew35 × 45 mm crop, white/blue/red, A4 sheet.ID card copyFront + back at real size on one A4 sheet.

These standards and browser references support the file-handling, image-processing and ID-card format statements above.
- W3C File API
Defines how a web application can access files that a person explicitly selects.
- MDN Canvas API
Documents browser-side drawing and photo manipulation used for local scan effects.
- ISO/IEC 7810:2019
Defines physical characteristics for identification-card formats, including the ID-1 format used by the copy layout.

Open the de-shadow toolCan I scan an ID card front and back onto one page?

{"@context":"https://schema.org","@type":"SoftwareApplication","name":"LensUp","applicationCategory":"UtilitiesApplication","operatingSystem":"Web browser","url":"https://lensup.ai/","author":{"@type":"Organization","@id":"https://lensup.ai/#organization","name":"LensUp","url":"https://lensup.ai/","logo":{"@type":"ImageObject","url":"https://lensup.ai/og.png"},"email":"contact@lensup.ai","sameAs":["https://github.com/ppop123/lensup-mcp"]},"publisher":{"@type":"Organization","@id":"https://lensup.ai/#organization","name":"LensUp","url":"https://lensup.ai/","logo":{"@type":"ImageObject","url":"https://lensup.ai/og.png"},"email":"contact@lensup.ai","sameAs":["https://github.com/ppop123/lensup-mcp"]},"datePublished":"2026-07-15","dateModified":"2026-08-14","description":"Free online document scanner that turns a photo into a clean, printable scanned PDF — crop, straighten, de-shadow, fade colored pen marks, compress toward a target size, and make an ID-card layout. Runs entirely in the browser; nothing is uploaded.","offers":{"@type":"Offer","price":"0","priceCurrency":"USD"},"featureList":["Scan photo to PDF","Perspective correction","De-shadow / even lighting","Fade colored pen marks","Compress toward a target size","ID card front & back"],"citation":["https://www.w3.org/TR/FileAPI/","https://developer.mozilla.org/en-US/docs/Web/API/Canvas_API","https://www.iso.org/standard/70483.html"],"browserRequirements":"Requires JavaScript","inLanguage":["en","ar","id","hi","bn","zh","es","pt","fr","ru","tr","vi","ur","fa","ja","it","de","th","pl","ko"]} {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"How do I scan a document to PDF without a scanner?","acceptedAnswer":{"@type":"Answer","text":"Photograph it, crop and straighten, choose a scan effect, then export — you get a clean scanned PDF, no hardware needed."}},{"@type":"Question","name":"Is it really free and private?","acceptedAnswer":{"@type":"Answer","text":"Yes. Unlimited, no watermark, no sign-up, and every step runs locally in your browser — files are never uploaded."}},{"@type":"Question","name":"Can I compress a PDF to 200 KB or another upload limit?","acceptedAnswer":{"@type":"Answer","text":"Choose a target such as 200 KB or 500 KB. LensUp tries to stay below it, but extreme targets may still return the smallest possible file with a warning."}},{"@type":"Question","name":"How do I scan a document to PDF without an app?","acceptedAnswer":{"@type":"Answer","text":"Photograph the page or choose an image, crop and straighten it, pick a scan effect, then export a scanned PDF. Everything runs in your browser, with no app or upload."}},{"@type":"Question","name":"How do I remove the shadow from a document photo?","acceptedAnswer":{"@type":"Answer","text":"Use De-shadow to remove shadow from the scan and even out the lighting, then use Edit to crop or correct perspective. Everything stays in your browser."}},{"@type":"Question","name":"Can I scan an ID card front and back onto one page?","acceptedAnswer":{"@type":"Answer","text":"Choose the ID card layout to place the first two pages as front and back at ID-1 size on one A4 sheet. Use Edit to crop or align the four corners manually."}}]}

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