Image to PDF Converter

Combine JPG, PNG, WebP or HEIC images into one PDF in your browser. Reorder pages, pick A4/Letter/fit-to-image. Nothing is uploaded. Free, no signup.

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Free Image to PDF Converter That Never Uploads Your Files

Turn photos, screenshots and scans into a single PDF document without sending anything to a server. Drop your images onto the page, put them in the right order, choose a page size, and download the finished PDF. The conversion runs entirely in your browser using JavaScript — your images never leave your device, there is no upload step, nothing is stored, and there is no account to create.

That matters more than it sounds. The images people most often want as a PDF are the sensitive ones: a photographed passport page, a signed contract, a medical form, a bank statement, an insurance claim, receipts for an expense report. Every free “online converter” that works by uploading is a copy of that document sitting on someone else’s infrastructure with an unknown retention policy. This tool has no server side to upload to. Open your browser’s network tab while you convert and you will see no request go out.

What This Converter Does

  • Multiple images into one PDF. Add as many images as you like; each becomes one page, in the order you set.
  • Drag-and-drop plus file picker. Drop files anywhere on the upload area, or tap it to open your phone’s photo gallery.
  • Reordering. Move any image up or down with the arrow controls until the page order is right. The preview thumbnails show exactly what page N will be.
  • Page size. A4, US Letter, Legal, or Fit to Image — which sizes each page to the exact pixel dimensions of its image so nothing is scaled or letterboxed.
  • Orientation. Portrait, landscape, or Auto, which picks per image based on whether it is wider than it is tall. A mixed set of portrait and landscape photos comes out correctly oriented page by page.
  • Adjustable margin. Set the white border in points; the image is scaled to fit inside it and centred, preserving aspect ratio.
  • Progress and download. A per-image progress indicator during conversion, then a direct download of the finished file.

Supported inputs are JPEG/JPG, PNG, GIF and WebP, plus HEIC/HEIF from iPhones where your browser can decode them (Safari on iOS can; most desktop browsers cannot yet). Individual files are limited to 10 MB, which is comfortably above a typical phone photo.

How to Convert Images to PDF

  1. Add your images. Drag them onto the upload area, or tap it and pick them from your gallery or file browser. Add more at any time with the “Add more” tile.
  2. Fix the order. Use the up and down arrows on each thumbnail. Page 1 is the first tile.
  3. Open Settings if you need them. Choose page size, orientation and margin. If you want the PDF to look exactly like the images with no borders, choose Fit to Image — that sets the margin to zero automatically.
  4. Convert. Press Convert to PDF and watch the progress counter run through your images.
  5. Download. The finished file downloads as photos.pdf. Rename it afterwards as you like.

Choosing the Right Settings

The three settings interact in ways worth understanding before you convert a stack of forty pages.

SettingChoose it whenWhat happens
A4 / Letter / LegalThe PDF will be printed or filed alongside other documentsEvery page is a fixed physical size; each image is scaled down to fit inside the margins and centred
Fit to ImageThe PDF is for screen viewing, or the images are screenshotsEach page is exactly the pixel dimensions of its image — no white space, no scaling, no cropping
Orientation: AutoYour images are a mix of portrait and landscapeEach page is rotated to match its own image’s aspect ratio
Margin 0Edge-to-edge output on a fixed page sizeThe image fills the page’s shorter dimension; the leftover is still centred
Margin 20–40 ptThe document will be printed or boundLeaves room for printer non-printable edges and hole punches

Aspect ratio is always preserved. The tool compares each image’s ratio against the available area and scales to whichever dimension binds first, so a wide photo on a portrait A4 page gets full width and vertical white space rather than being stretched. Nothing is ever cropped.

Why In-Browser Conversion Is Different

Server-side converters follow a fixed pattern: your image is POSTed to an API, written to disk or object storage, processed, and served back as a download link. Even with good intentions, that leaves copies in at least three places — the upload buffer, the working directory, and the CDN cache in front of the download URL — and the retention policy for each is something you are taking on trust.

This tool reads the image with the browser’s own FileReader, measures it in memory, and assembles the PDF with a JavaScript PDF library loaded into the page. The resulting file is created as an in-memory blob and handed to your browser’s download mechanism. There is no origin server involved in the conversion at any point. The practical consequences: it also works offline once the page is loaded, it is fast because nothing crosses the network twice, and the file size limits are set by your device’s memory rather than by someone’s upload quota.

The honest trade-off is that very large batches are bounded by RAM. A few dozen phone photos is routine; several hundred high-resolution scans in one pass may make a low-memory device struggle. Convert in batches and merge afterwards if you hit that.

Frequently Asked Questions

Are my images uploaded anywhere?

No. Reading, measuring and PDF assembly all happen in your browser’s memory. There is no upload endpoint. You can verify this yourself: open your browser’s developer tools, switch to the Network tab, and run a conversion — no request carries your image data.

How do I convert photos to PDF on an iPhone?

Open this page in Safari, tap the upload area, choose Photo Library, and select your photos. Arrange the order, tap Convert to PDF, then Download — the file lands in Files or your Downloads. No app install is needed. iPhone HEIC photos work in Safari because iOS can decode them natively.

Can I combine several photos into one PDF?

Yes — that is the default behaviour. Every image you add becomes one page of a single PDF, in the order shown in the thumbnail list.

What image formats are supported?

JPEG/JPG, PNG, GIF and WebP everywhere, and HEIC/HEIF on browsers that can decode it (currently Safari on iOS and macOS). If a HEIC file will not load on desktop, convert it to JPEG first with our image format converter.

Is there a file size or page limit?

Each individual image must be under 10 MB. There is no fixed limit on the number of pages, but because everything is held in memory, very large batches are bounded by your device’s available RAM rather than by a server quota.

Does it preserve image quality?

The original image data is embedded in the PDF; nothing is re-compressed by the tool. If you choose a fixed page size, the image is scaled geometrically to fit the page — the pixels are unchanged, only the rendered dimensions are. Choose Fit to Image if you want the PDF page to match the source pixel-for-pixel.

Why does my PDF have white borders?

Two reasons: a non-zero margin setting, and the difference between your image’s aspect ratio and the page’s. A 4:3 photo on A4 will always leave space somewhere. Set the margin to 0, or switch to Fit to Image to eliminate both.

Can I reorder pages after adding images?

Yes. Each thumbnail has up and down controls, and you can remove any image entirely. Reordering resets the generated PDF, so convert again after you finish rearranging.

How do I make the resulting PDF smaller?

Shrink the images before converting, since PDF size is dominated by the embedded image data. Run them through our image compressor first, or run the finished document through the PDF compressor.

Does it work offline?

Once the page has finished loading, yes — conversion needs no network connection at all.

Related Tools

Already have PDFs to combine? Use the PDF merger to join documents, the PDF splitter to break one apart, and the PDF to image converter to go the other direction. For preparing the source images themselves, the image format converter handles HEIC, WebP and PNG conversion in the browser too.

What Is Image to PDF Conversion

Converting images to PDF (Portable Document Format) creates universally viewable documents from visual content. PDFs maintain consistent formatting across all devices and operating systems, making them the standard format for sharing documents professionally. Converting images to PDF is essential for digitizing paper documents, combining multiple images into a single document, and preparing visual content for professional distribution.

This tool converts images to PDF directly in your browser with no server uploads, preserving the privacy of your documents while offering page sizing, orientation, and multi-image support.

PDF vs Image Format Comparison

FeaturePDFJPEG/PNG
Multi-pageYes — unlimited pagesNo — single image per file
Text searchableYes (with OCR or native text)No
Print consistentExact same output everywhereDepends on viewer/printer settings
Password protectionYesNo
Form fieldsYesNo
File sizeDepends on contentDepends on resolution and compression
EditingRequires PDF editorStandard image editors

Common Use Cases

  • Document digitization: Scan paper documents as images, then convert to PDF for organized digital archives with consistent formatting
  • Portfolio creation: Combine multiple images (designs, photographs, illustrations) into a single PDF portfolio document
  • Invoice and receipt archiving: Convert photographed receipts and invoices to PDF for consistent filing and email sharing
  • Report generation: Assemble screenshots, charts, and diagrams into a single PDF document for professional reports
  • Print preparation: Convert images to PDF with specific page sizes (A4, Letter, custom) for consistent print output

Best Practices

  1. Choose the right page size — Match the page size to your intended output: A4 for standard documents, Letter for US correspondence, or custom dimensions for specific print requirements.
  2. Optimize image resolution — For screen viewing, 150 DPI is sufficient. For printing, use 300 DPI. Higher resolutions increase PDF file size without visible improvement.
  3. Maintain aspect ratio — When fitting images to pages, maintain the original aspect ratio to avoid distortion. Use margins or centering to fill remaining space.
  4. Compress for sharing — Large images in PDFs create unwieldy files. Apply JPEG compression to embedded images when the PDF will be shared via email or web.
  5. Add meaningful filenames — Name the output PDF descriptively (e.g., "site-inspection-2024-01-15.pdf" rather than "image.pdf") for easier organization and retrieval.

Frequently Asked Questions

How do I convert a picture to PDF on my iPhone?+

Open this tool in Safari on your iPhone, tap the upload area, and select photos from your camera roll. You can add multiple photos and reorder them by dragging. Choose your page size (A4, Letter, or Fit to Image), then tap Convert to PDF. The PDF downloads directly to your Files app or can be shared to any app.

Can I convert multiple photos to one PDF document?+

Yes! This tool is designed for combining multiple images into a single PDF. Upload as many photos as you need, drag to reorder them, and convert them all at once. Each image becomes a separate page in the PDF. This is perfect for creating photo albums, document scans, or presentation materials.

What image formats are supported for PDF conversion?+

The converter accepts JPEG, PNG, WebP, GIF, BMP, and HEIC formats. HEIC (iPhone's default photo format) is automatically converted before adding to the PDF. If you have images in other formats, use our Image Format Converter tool first to convert them to a supported format.

Is there a limit to how many images I can add to a PDF?+

There's no hard limit on the number of images. However, since processing happens in your browser, very large PDFs (50+ high-resolution images) may be slow on older devices. For best performance, consider reducing image quality or creating multiple smaller PDFs for very large collections.

Does this tool work offline on my phone?+

After the page loads initially, the core conversion functionality works offline because all processing happens in your browser. However, you'll need an internet connection to first load the tool. For fully offline use, add this page to your home screen as a web app.

How do I change the page orientation in the PDF?+

The tool automatically detects each image's orientation and rotates the PDF page to match. Portrait photos create portrait pages, landscape photos create landscape pages. You can also manually rotate individual images before conversion using the rotate button on each thumbnail.

Are my photos uploaded to a server?+

No. This is a 100% client-side tool - your photos never leave your device. All conversion happens locally in your browser using JavaScript. This means your photos remain completely private, and you can use the tool even on slow connections since no upload is required.

Can I rearrange the order of images in the PDF?+

Yes! After adding images, you can drag and drop thumbnails to reorder them. On touch devices, press and hold an image, then drag it to the desired position. The PDF pages will match your final arrangement. You can also remove individual images by tapping the X button.

What quality setting should I use for my PDF?+

For documents and text-heavy images, 70-80% quality is usually sufficient and keeps file sizes small. For photo albums where image quality matters, use 90-100%. Higher quality means larger file sizes. The preview shows approximate file size so you can find the right balance.

How do I convert HEIC photos from my iPhone to PDF?+

Simply select HEIC photos from your camera roll - the tool automatically converts them to JPEG internally before adding to the PDF. No extra steps needed. If you want to keep the HEIC files as separate JPEGs first, use our HEIC to JPG Converter tool.

This tool is provided for informational and educational purposes only. All processing happens in your browser — no data is sent to or stored on our servers. While we strive for accuracy, we make no warranties about the completeness or reliability of results.