Images to PDF Converter

This free images to PDF converter combines JPG, PNG, and WebP files into a single PDF document — one page per image, in exactly the order you choose. Drag your images in, reorder and rotate the thumbnails, then pick a page size from A0 to A6, Letter, or Legal, set the margins, and download. It runs entirely in your browser: your photos are processed on your own device and are never uploaded to a server.

How to use the images to PDF converter

1. Add your images. Drag JPG, PNG, or WebP files onto the drop zone, or click to browse. You can select many at once, and the Add images button appends more later. Everything is read directly on your device — nothing is uploaded.
2. Put the pages in order. Each image becomes one PDF page. Drag the thumbnails to reorder them, rotate any image in 90° steps, and remove the ones you don’t want. Clear all starts the batch over.
3. Choose a page size. The default, Fit to image, sizes each page to match its image exactly. Or pick a fixed format — A0 through A6, US Letter, or Legal — or enter a custom width and height in millimetres (10 mm up to 2,000 mm per side).
4. Set orientation and margins. With a fixed page size selected, switch between portrait and landscape and choose a margin: none, small (~5 mm), big (~20 mm), a preset from 5 to 25 mm, or a custom value. The image is centred and scaled to fit inside the margins without cropping or stretching.
5. Download. Click Download PDF and the file is assembled in your browser. A single image keeps its original filename with a .pdf extension; multiple images download as images.pdf.

JPG to PDF vs PNG to PDF: what happens to compression

PDF is a container format, and it handles the two most common image types very differently — which is worth understanding before you convert.

A JPG is already compressed with the lossy DCT (discrete cosine transform) method, and PDF supports that exact encoding natively through its DCTDecode filter. That means a JPEG can be embedded in a PDF byte for byte, with no decompression and no re-encoding. This tool does exactly that: an unrotated JPG goes into the PDF as the same compressed stream you loaded, so there is zero generation loss and the page weighs roughly what the original file did. This is why a PDF built from JPGs is usually barely larger than the sum of the images themselves.

A PNG is compressed losslessly with DEFLATE, and PDF supports lossless FlateDecode streams in the same way. An unrotated PNG is embedded losslessly here too — every pixel survives intact, including sharp edges in screenshots, line art, and text. The trade-off is size: lossless data is bigger, so a PDF assembled from full-resolution PNG screenshots can be many times heavier than the same pages built from JPGs. As a rule of thumb, use PNG pages for screenshots, diagrams, and anything with text or hard edges, and JPG pages for photographs, where lossy compression is visually invisible and dramatically smaller.

The practical consequence: this converter never recompresses what it doesn’t have to, so converting images to PDF here is not a quality decision — the quality decision was already made when the images were saved. If a scan or photo looks soft, it will look identical in the PDF; if you need smaller files, compress the images before conversion rather than hoping the PDF stage will do it, because a faithful converter deliberately won’t.

WebP is the exception, because the PDF format has no native WebP filter. This converter accepts WebP files and transparently redraws them as high-quality JPEG (92% quality) before embedding. The same conversion applies to any image you rotate in the tool, since rotation requires redrawing the pixels. For most photos the difference is imperceptible, but if a pixel-perfect PNG matters to you, rotate it in an editor first and load it unrotated.

Page sizes, points, and DPI: how A4 and Letter really work

PDF pages are measured in points, where one point is exactly 1/72 of an inch — a convention PDF inherited from PostScript. Every preset in this tool is defined in millimetres and converted to points at 72 / 25.4 ≈ 2.8346 points per millimetre. An A4 page is therefore 210 × 297 mm, which is 595.3 × 841.9 points; US Letter is 8.5 × 11 inches, or exactly 612 × 792 points.

Preset	Millimetres	Inches	PDF points
A0	841 × 1189	33.11 × 46.81	2383.9 × 3370.4
A1	594 × 841	23.39 × 33.11	1683.8 × 2383.9
A2	420 × 594	16.54 × 23.39	1190.6 × 1683.8
A3	297 × 420	11.69 × 16.54	841.9 × 1190.6
A4	210 × 297	8.27 × 11.69	595.3 × 841.9
A5	148 × 210	5.83 × 8.27	419.5 × 595.3
A6	105 × 148	4.13 × 5.83	297.6 × 419.5
Letter	215.9 × 279.4	8.5 × 11	612 × 792
Legal	215.9 × 355.6	8.5 × 14	612 × 1008

The ISO A series has an elegant property: every size has a 1:√2 aspect ratio, so halving a sheet along its long edge produces the next size down with the same proportions — A3 folded in half is A4, A4 folded is A5. North American Letter and Legal don’t share that ratio, which is why a document laid out for one system never quite fits the other.

The Fit to image default works differently: instead of scaling your image onto a fixed sheet, it creates a page whose dimensions match the image, at one PDF point per pixel (capped at 4,000 points on the longest side). One point per pixel corresponds to a nominal 72 DPI, which is irrelevant on screen — PDF viewers scale pages to the window — but matters if you print. A 1,200-pixel-wide screenshot on a fit-to-image page would print about 16.7 inches wide at full size, so choose A4 or Letter when the PDF is destined for paper.

Why image order and resolution matter for print vs screen

Page order in a PDF is fixed at creation time. Unlike a folder of images that any viewer can re-sort by name or date, the pages of a PDF render in exactly the sequence they were written, in every viewer, forever. That is precisely what makes PDF the right wrapper for receipts, scanned contracts, multi-page artwork, and portfolio spreads — and why the drag-to-reorder step here matters. Get the sequence right before you download; the thumbnails you see are the pages you get.

Resolution is the other decision that outlives the conversion. For screen reading, almost anything works: a viewer zooms the page to fit, so even a modest 1,000-pixel image reads cleanly. For print, the arithmetic is stricter. Print quality is usually specified at 300 DPI (dots per inch), and a full A4 page at 300 DPI needs roughly 2480 × 3508 pixels; US Letter needs 2550 × 3300. At 150 DPI — acceptable for internal documents and drafts — halve those figures. If your source image is smaller than the target, this tool never invents pixels: it scales the image to fit the printable area inside your margins, preserving its aspect ratio, and the printer’s interpolation does the rest. A 1,200-pixel-wide photo filling an A4 width therefore prints at about 145 DPI — fine on a desk, soft in a portfolio.

Modern phone cameras make the print threshold easy to clear: a 12-megapixel photo is around 4032 × 3024 pixels, comfortably above 300 DPI on A4 in landscape. Screenshots are the usual weak point — a laptop screenshot is bound to the display’s resolution, so a full-screen capture from a 1440p monitor tops out near 300 DPI only at roughly A5 size. When a screenshot must print large, capture on a high-density (Retina-class) display or zoom the interface before capturing.

Margins interact with this too. A margin removes printable area from both sides, so a 20 mm margin on A4 leaves a 170 × 257 mm live area, and the image is scaled down to fit it. For borderless-looking documents choose No margin; for anything headed to an office printer, keep at least 5 mm, since most printers cannot print to the physical edge of the sheet and will clip a zero-margin page.

Scanning documents with your phone camera: getting clean pages before you convert

A huge share of image-to-PDF jobs start as phone photos of paper — receipts, contracts, ID pages, homework. The conversion step is easy; the capture step is where scans go wrong, and no converter can fix a bad photo afterward. Three habits make the difference. Shoot straight-on: hold the phone parallel to the page, because any tilt turns rectangles into trapezoids (perspective distortion) and makes text lines run uphill. Control the light: place the light source to your side rather than behind you, so your phone and hands don’t cast a shadow across the page, and switch off the flash, which blows out a hotspot in the middle of glossy paper. Fill the frame, with a small margin: get close enough that the page dominates the photo, then crop before converting.

Know when to reach for a dedicated scanner app instead. Tools like the iPhone Notes scanner, Google Drive’s scan mode, or Adobe Scan automatically detect page edges, correct perspective (deskew), flatten shadows, and apply a high-contrast black-and-white “document” filter — corrections a faithful converter deliberately never applies, because this tool embeds your images exactly as they are. The practical split: use a scanner app when the source is paper and legibility is the goal; use this converter when the images are already clean — photos, screenshots, exports, or scans you’ve already processed — and the job is assembling them into one ordered document with proper page sizes and margins.

Preview, Print to PDF, and the command line: how the built-in options compare

Every major OS can make a PDF from images without installing anything, and it’s worth knowing the native routes.

Method	How	Limitation
macOS Preview	Open images together, then File → Print → Save as PDF	Re-renders images through the print pipeline; page-size control is coarse
Windows Print to PDF	Select images in Explorer → Print → Microsoft Print to PDF	Fixed paper sizes; order follows filenames, not drag-and-drop
img2pdf (CLI)	img2pdf -o out.pdf *.jpg	Lossless JPEG embedding, but command-line only
ImageMagick	magick *.png out.pdf	Re-encodes every image, so quality and size can drift

The native routes shine for one-off jobs on your own machine. The browser tool wins when you want visual drag-to-reorder, per-image rotation and removal, exact page sizes from A0 to A6 with millimetre-precise margins, or the img2pdf-style byte-for-byte JPEG embedding without touching a terminal — and it behaves identically on a Chromebook, a locked-down work laptop, or a phone, where the desktop options don’t exist.

Frequently asked questions

Is this free and private?

Yes. The converter is completely free — no sign-up, no watermarks, and no page limits. It is also genuinely private: the entire conversion runs in your browser using the open-source pdf-lib library, so your images are read and assembled into a PDF on your own device and are never transmitted to a server. You can verify this yourself — once the page has loaded, the tool keeps working with your network connection switched off.

Does it reduce image quality?

In most cases, no. Unrotated JPG files are embedded in the PDF byte for byte, with no re-encoding and therefore no generation loss, and unrotated PNG files are embedded losslessly. Two operations do require redrawing the pixels: WebP files (PDF has no native WebP support) and any image you rotate in the tool. Both are re-encoded as high-quality JPEG at 92% quality, a level at which photographic content is visually indistinguishable from the original.

What image formats can I convert?

The tool accepts JPG/JPEG, PNG, and WebP, which together cover nearly everything a phone camera, screenshot tool, or design export produces. Formats such as HEIC, GIF, TIFF, and SVG are not accepted directly — export or convert them to JPG or PNG first, then drop them in. You can mix formats freely in one document: a PDF can happily contain JPG pages next to PNG pages.

Can I reorder, rotate, or remove pages before downloading?

Yes — that is the core of the workflow. Every image appears as a thumbnail; drag thumbnails to change the page order, use the rotate buttons to turn an image in 90° steps, and remove any image individually. Each image becomes exactly one page, so what you see in the thumbnail strip is the final page sequence. If you need to rearrange pages in a PDF that already exists, use the Organize PDF tool instead.

Is there a limit on how many images I can convert?

The tool imposes no fixed cap on the number of images or pages — the running summary above the thumbnails shows the count and combined size as you add files. Because the whole document is assembled in your browser’s memory, the practical ceiling is your device: batches of dozens of photos are routine on an ordinary laptop, while hundreds of very large scans may get slow. For huge jobs, build the PDF in a few parts and join them with the PDF Merge & Split tool.

Which page size should I choose?

If the PDF will only ever be viewed on screen, keep the default Fit to image — every page matches its image exactly, with no borders and no scaling. If the PDF will be printed, pick the paper you’ll print on: A4 in most of the world, Letter in North America, with at least a small margin so the printer doesn’t clip the edges. For posters and large-format work the A0–A2 presets apply, and the custom option accepts any size from 10 mm to 2 m per side for labels, banners, or square social layouts.

How do I make the PDF small enough to email?

Gmail caps attachments at 25 MB and Outlook.com at 20 MB — and email encoding inflates files by roughly a third in transit, so a safe target is 10–15 MB. Since this tool embeds JPGs without recompressing them, shrink the images before converting: run photos through an image compressor or resize them to around 2,000 pixels on the long edge, then rebuild the PDF.

Will the text in my photos be searchable?

No. Each page is the image itself, so text in a photographed document is pixels, not selectable characters. Making it searchable requires OCR (optical character recognition), which is a separate step — scanner apps like Adobe Scan or desktop tools like Acrobat can add an invisible text layer. For sharing, printing, or uploading to a portal, an image-only PDF is usually all you need.

Does this work on iPhone and Android?

Yes — the tool runs entirely in the mobile browser, with the same drag-to-reorder and page-size options. One iPhone caveat: recent iPhones save photos as HEIC, which isn’t accepted directly. Either set Settings → Camera → Formats to Most Compatible so new photos save as JPG, or share the photos to yourself, which typically converts them to JPG automatically.

Can I add these images to a PDF I already have?

Yes, in two steps: convert the images to a PDF here, then combine that file with your existing document using the PDF Merge & Split tool, placing the files in whatever order you need. Because both tools run locally in your browser, the whole workflow stays on your device.

Related design tools

• PDF Merge & Split — combine several PDFs into one, or split a document into parts.
• Organize PDF — reorder, rotate, and delete pages in an existing PDF.
• PDF Watermark — stamp text or an image watermark across PDF pages.
• Image Compressor — shrink JPG, PNG, and WebP files before converting them to PDF.
• Image Resizer & Cropper — resize or crop images to exact pixel dimensions first.