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Convert Scanned Images to PDF

Flatbed scanners and document cameras typically output one image file per page, leaving you with a folder of JPG, PNG, or TIFF files that you have to manually order and share.

Multi-page PDF from scans

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Preserves scan resolution

No upload to any server

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Add this Image to PDF to your website

Drop the Image to PDF into any page — blog post, product docs, intranet, school portal — with a single line of HTML. Your visitors get the full tool, processed entirely in their browser. No backend, no uploads, no signup.

  • Files stay 100% in the visitor's browser
  • Responsive — adapts to any container width
  • Free forever, no API key needed

Embed code

<iframe
  src="https://www.fixtools.io/pdf/image-to-pdf?embed=1"
  width="100%"
  height="780"
  frameborder="0"
  style="border:0;border-radius:16px;max-width:900px;"
  title="Image to PDF by FixTools"
  loading="lazy"
  allow="clipboard-write"
></iframe>

Attribution-friendly: a small "Powered by FixTools" link appears in the embed footer.

Turning a folder of scanned page images into a proper archival PDF

Document scanners broadly fall into two categories by output format. Sheet-fed office scanners typically produce a single multi-page PDF directly, often with OCR layered on top. Flatbed scanners, phone scanning apps in image mode, and document camera setups usually produce one raster image per page (JPG, PNG, or TIFF) saved to a folder. The second category leaves you with the manual task of stitching the images together into a PDF, which is where FixTools fits. Drop the folder of page images onto the tool, set the page size to match the physical paper (A4 for ISO standard documents, US Letter for North American documents), and the converter produces a single multi-page PDF in the correct order.

Resolution matters for scanned documents in a way it does not for casual photos. Archival scans are typically captured at 300 DPI, which translates to roughly 2480 by 3508 pixels for an A4 page. FixTools embeds the scan pixel data without recompression for JPG sources (the JPEG bytestream passes through untouched) and with lossless FlateDecode for PNG and TIFF sources. The PDF page is sized to match the physical paper dimensions you select, so when the PDF is printed it reproduces at 1:1 scale with the original document. This matters for legal records, medical files, and any context where the scanned document is intended to substitute for the physical original.

Order preservation is the second key concern. Scanners typically name output files sequentially (scan001.jpg, scan002.jpg, ...) which sorts correctly alphabetically. FixTools sorts your dropped files by filename and lets you drag thumbnails to manually adjust the order before generating the PDF, which handles the case where you scanned a few pages out of sequence and inserted them later. The resulting PDF preserves the order you set, with each scan on its own page sized to A4 or Letter, ready to archive or share.

The privacy property matters more for scanned documents than for most other image to PDF workflows. Scans of contracts, ID documents, medical records, financial statements, and legal correspondence contain highly sensitive content that should not pass through a third-party server. FixTools runs entirely client side, so the scan data never leaves your device. You can verify this by opening the browser developer tools and watching for outbound traffic during the conversion. There is none. This is structurally safer than uploading to any server-side converter, regardless of how trustworthy the operator might be, because there is no upload to compromise in the first place.

How to use this tool

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Drop your scan images onto FixTools. The tool assembles them into a multi-page PDF matched to standard paper sizes, downloadable instantly.

How It Works

Step-by-step guide to convert scanned images to pdf:

  1. 1

    Scan each page to image

    Use your scanner or scanning app to save each page as JPG, PNG, or TIFF at 300 DPI for archival quality. Filenames should be sequential (scan001, scan002, ...) so they sort correctly in the conversion step. Save all scans to a single folder for easy batching.

  2. 2

    Open FixTools

    Navigate to the FixTools Image to PDF page. The tool loads in your browser with no install, no extension, and no sign up. Make sure your browser has enough memory available if you are converting a long document with many pages at full scan resolution.

  3. 3

    Drop and order the scans

    Drag all the page images from your scan folder onto the upload area in one go. The tool sorts them alphabetically, which matches the sequential naming pattern. Drag thumbnails to manually reorder if any pages are out of place, and remove unwanted pages with a single click on the thumbnail.

  4. 4

    Set page size and convert

    Choose A4 or US Letter to match the physical paper. Click Convert to PDF and the tool assembles a multi-page PDF with each scan on its own page, sized to match the paper dimensions. Save the file to your records folder with a descriptive name.

Real-world examples

Common situations where this approach makes a real difference:

Solicitor archiving a paper contract

A small solicitor practice receives a sixteen page paper contract that needs to be archived as a single PDF in the firm's document management system. They scan each page on the office flatbed at 300 DPI, producing sixteen JPG files. FixTools combines them into one A4 PDF in under twenty seconds, the file is named with the client matter number, and it lands in the document management system without any of the page images ever passing through a cloud service that the firm's data protection policy would prohibit.

Family digitising an inheritance of paper letters

A family inheriting a relative's archive of paper letters spends an afternoon scanning a hundred and twenty letters on a portable document scanner. Each letter is one to four pages. They batch the scans into separate folders per letter, run each through FixTools to produce one PDF per letter, and archive the PDFs to a private cloud drive with descriptive names. The originals can then be safely stored in archival sleeves while the family searches and shares the digital copies.

Researcher digitising microfiche printouts

A historical researcher prints fifty pages of microfiche records at a national archive, then scans them at home for searchable archival. FixTools combines the JPG scans into a single PDF per archive record, preserving page order via filename sorting. The resulting PDFs go into the researcher's citation database with proper metadata, replacing the bulky paper printouts which can then be recycled now that the digital copies exist.

Accountant assembling tax records for a client

An accountant receives a shoebox of paper receipts from a small business client at year end. They scan the receipts at 200 DPI using a desktop ADF scanner that outputs JPG, end up with three hundred and twenty image files, and want to deliver one PDF per expense category to the client and to HMRC. FixTools handles each category folder in turn, producing six clean PDFs in twenty minutes total, all without any of the receipt images passing through a third-party converter where tax data could leak.

Pro tips

Get better results with these expert suggestions:

1

Scan at 300 DPI for archival quality

300 DPI is the standard threshold for archival document scans and matches the resolution most printers can reproduce. 150 DPI is acceptable for screen-only viewing but prints fuzzy. 600 DPI doubles the file size with no visible benefit for most documents. Stay at 300 unless your source has unusually fine detail (engineering drawings, dense small print) where 600 might help.

2

Use ADF for multi-page documents to keep order

An automatic document feeder (ADF) on a flatbed scanner names pages in scan order automatically, removing the manual sequencing step. If your scanner has an ADF and the document is loose-leaf, use it. If you have to scan one page at a time, save each immediately with a sequential filename so the alphabetical sort in FixTools picks up the right order.

3

Choose page size to match the physical document

A scan of an A4 page should produce a PDF page sized A4. A scan of a US Letter page should produce US Letter. Mismatched page sizes lead to the PDF rendering at the wrong physical scale when printed, which matters for legal documents intended to substitute for the original.

4

Compress JPG scans first if file size is a concern

A 300 DPI A4 JPG scan is typically 2 to 5 MB. A hundred-page document at that resolution is 200 to 500 MB. If this is too large for email or upload, run the JPGs through the FixTools Image Compressor first at quality 75 to 80, which cuts size by half with no visible loss for typed documents.

FAQ

Frequently asked questions

300 DPI is the standard for archival-quality document scans. It captures enough detail for clean printing and OCR while keeping file sizes manageable. 150 DPI is too low for printing but fine for screen-only documents. 600 DPI is overkill for most documents and doubles the storage cost. Stay at 300 unless you have a specific reason to go higher, such as engineering drawings with very fine detail.
Yes. FixTools accepts mixed formats in a single batch. Drop everything into the upload area together and the tool detects each format from its magic bytes and applies the right encoder: JPG passes through losslessly, PNG and TIFF are decoded and re-embedded with FlateDecode. The output is one coherent PDF regardless of how many source formats you mixed.
No, not from raw image scans. The PDF contains the scanned pixel data, not text. For a searchable PDF, run the output through an OCR step such as Adobe Acrobat Pro's recognise text feature, Apple Preview's Live Text on Mac, or a dedicated OCR tool. FixTools focuses on the image-to-PDF assembly step; OCR is a separate workflow that adds a text layer behind the image layer.
Practical limit is browser memory rather than tool limit. A typical laptop handles a hundred page document at 300 DPI without trouble. Documents above two hundred pages may slow the browser or hit memory limits, in which case split into two batches and combine with the FixTools PDF Merger afterward.
No. The conversion runs entirely in your browser using local JavaScript. Scan data stays in browser memory on your device and is never uploaded to any server. You can verify by opening browser developer tools, switching to the Network tab, and confirming no outbound traffic during the conversion. This is particularly important for sensitive scans such as legal documents, medical records, and financial statements.
For European, UK, Asian, and Australian documents the physical paper is almost always A4 (210 by 297 mm). For North American documents it is US Letter (215.9 by 279.4 mm) for most paper and Legal (215.9 by 355.6 mm) for long-form legal documents. Match the PDF page size to the source paper for accurate 1:1 reproduction when the PDF is printed.
No. JPG scans are embedded with the original JPEG bytestream intact (lossless from JPG to PDF). PNG and TIFF scans are decoded and re-embedded using lossless FlateDecode compression, preserving every pixel exactly. The PDF you download contains the same scan pixel data as the source files, with no recompression or quality reduction.

Related guides

More use-case guides for the same tool:

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