Scan Document to PDF

Turn phone photos of paper documents into a clean, multi-page PDF — with auto corner detection, perspective correction, and optional background removal, all in your browser.

Upload Document Images

Drag & drop files here, click to browse, or use your camera. Supports multiple files — JPG, PNG, WEBP, HEIC.

Paper Size

Format

Color Mode

Remove background

Erase the background around each detected page after perspective correction. Best for clean, isolated documents — adds extra processing time per page.

Upload or capture at least one page to continue

How It Works

Process your images in three simple steps

Upload or Capture Pages

Drop in photos of your document pages (JPG or PNG), or tap Use Camera to capture them live with an A4-shaped alignment guide. Add pages one by one or select a batch from your camera roll.

Auto-Crop, Straighten, Clean Up

Each page's corners are detected automatically, the crop is applied, and perspective correction flattens any tilt. Pick a color mode — Original, Grayscale, or Black & White — and optionally remove the background for a pure white finish.

Download Your PDF or Images

Export all pages as a single combined PDF, or download each page as a JPEG or PNG inside a ZIP archive. Everything runs in your browser — nothing is saved on any server.

Why Choose Imresizer?

Fast, secure, and completely free image resizing

100% Private
Every step — capture, corner detection, perspective fix, background removal, and PDF export — runs locally in your browser. Your documents never touch a server, so sensitive paperwork stays on your device and nowhere else.
Multi-Page PDF in One Go
Stack up to 20 pages per session, reorder them with a drag, remove any mistakes, and export everything as a single clean PDF. No stitching files together afterwards.
Auto Corner Detection and Crop
The scanner finds the four corners of each page and crops along them without you dragging anything. If a corner lands in the wrong spot, nudge it manually and the crop re-applies instantly.
Perspective Correction
Photos shot at an angle come out flat and rectangular. Each page is warped into a proper scanner-style rectangle, so tilted captures read just like they would on a desktop flatbed.
Background Removal
Run on-device AI to erase the desk, hand, or clutter around the page. You end up with a clean, isolated document on white — useful when the paper's edges blend into a busy surface.
Three Color Modes
Original keeps colors as-is for photos or diagrams. Grayscale removes color while keeping tonal detail. Black & White goes pure two-tone — sharp text, the smallest file sizes, ideal for typed notes or forms.
PDF, JPEG, or PNG Export
Download a single combined PDF for sharing and official submissions, or get each page as a separate image inside a ZIP if you need the files individually.
Fast, No Waiting
Processing runs in your browser with no server round-trip. From upload to download typically takes under 30 seconds — even on a slow connection, since nothing is being transmitted.
Works on Any Device
Use your phone camera for on-the-go scanning or drag files from your desktop for bulk uploads. The layout adjusts cleanly to every screen size without losing any controls.

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Testimonials

What Our Users Say

Trusted by thousands of users worldwide since 2015

“

Scanned a stack of receipts from my phone in one session. The multi-page capture is way faster than emailing photos to myself and stitching them in Word.

“

Auto corner detection was spot on. I didn't have to touch the crop handles once across five pages.

“

I needed to send my landlord a signed lease. Took photos of each page, reordered one that was out of sequence, and had a clean PDF in under two minutes.

“

The black-and-white mode makes handwritten notes look like they came off a proper office scanner. File sizes are tiny too.

“

No upload means I'll actually use this for tax documents. Privacy matters when the content is sensitive.

“

Background removal cleaned up my photos where the desk was showing. Ended up with a proper white-page PDF.

“

Didn't expect perspective correction to handle my sideways shots so well. Every page came out rectangular.

“

Works on my iPhone without any app. Just opens in Safari and does exactly what I need.

Frequently Asked Questions

Everything you need to know about image resizing

What is an online document scanner?

It's a browser-based tool that converts photos of paper documents into clean, multi-page PDFs or image files. You upload or capture photos of each page, the tool detects corners, crops and straightens them automatically, and you download a finished document — no app, no server, no account needed.

How do I scan a document to PDF on my phone?

Open the scanner in your phone's browser, tap Use Camera, and capture each page using the A4-shaped alignment guide. When you've photographed all the pages, tap Done and choose PDF as your export format. The file downloads directly to your device.

How does the auto corner detection work?

Each uploaded or captured photo is analyzed to find the four corners of the page. The detected quadrilateral is used to crop and straighten the page in one step. If a corner lands in the wrong place, drag it to the right spot and the crop re-runs with your adjusted points.

What is perspective correction?

Perspective correction warps a tilted photo so the page appears as a clean rectangle. A shot taken at an angle, where the top of the page looks narrower than the bottom, is flattened into a proper scanner-style image. It runs automatically after the crop is applied.

Can I remove the background from scanned pages?

Yes. After cropping, you can apply on-device background removal to isolate the page on clean white. This helps when the document was photographed on a busy surface or one that blends into the paper's edges — a common issue with beige desks and white paper.

How many pages can I scan in one session?

Up to 20 pages per session. A warning banner appears as you get close to the limit. For longer documents, split them across two sessions and combine the resulting PDFs with any free PDF merger.

Are my documents ever uploaded to a server?

Nothing is uploaded. The corner detection, perspective correction, color mode, background removal, and PDF export all run locally in your browser using client-side processing. Your document photos stay on your device from start to finish — no cloud storage, no server ever receives your files.

What's the difference between Grayscale and Black & White?

Grayscale preserves all shades of gray — useful for photos, diagrams, or anything with tonal variation. Black & White is pure two-tone: each pixel becomes either fully black or fully white. It makes typed or printed text very sharp and produces the smallest possible file sizes, which is ideal for text-only documents, forms, and handwritten notes.

Which file formats can I export?

Choose PDF to combine all pages into a single file — the most widely accepted format for document submissions. Or pick JPEG or PNG to download each page as a separate image inside a ZIP archive if you need the files individually.

Can I reorder pages after scanning?

The page grid lets you drag and drop pages into any order before exporting. You can also remove a page and re-capture it if the original shot didn't come out cleanly — without losing the other pages you've already scanned.

Does the auto-crop work if photos are taken at an angle?

The scanner detects the edges of the page and applies perspective correction, so photos taken at a moderate angle come out flat and rectangular in the output. For best results, keep the page on a plain, contrasting background and avoid strong glare or shadows covering the edges.

Does the scanner work without an internet connection?

After the page loads, yes. All processing runs locally in your browser, so the scanner keeps working even if your connection drops mid-session. Just make sure the page is fully loaded before going offline.

Do I need to create an account or pay anything?

The scanner is completely free with no account or login required. You can scan as many documents as you need without any watermarks on the output or restrictions on page count.

What image formats can I upload?

JPG and PNG are both supported. Most phone cameras produce JPG files by default, which work perfectly. If you have screenshots or PNG exports from another app, those work too. For camera capture, the viewfinder is built directly into the tool.

Is the PDF output accepted for official submissions?

The exported PDF is a standard, unencrypted file — the same format most banks, government portals, universities, and employers request for document verification. If an institution has specific requirements like file size limits or color restrictions, apply the appropriate color mode before exporting.