Converting images to PDF is one of those tasks that comes up constantly — submitting scanned documents, sending a portfolio, combining photographed receipts into one file, packaging design assets for a client. A PDF keeps everything in one place, in a fixed order, that looks the same on every device and can be opened without any special software.
Portimg's image to PDF converter handles this in the browser without an account or installation. Here's how to use it and what to pay attention to for consistently clean output.
The conversion
Go to portimg.com/image-to-pdf, upload your images — JPG, PNG, and WebP are supported — arrange them in the order you want the pages to appear, configure the page settings, and download the PDF. Files are deleted from the server after processing. No account is required.
Order is the one thing to get right before converting. If you're uploading a batch, naming files sequentially before uploading (01.jpg, 02.jpg) keeps them in the correct order automatically. You can also reorder by dragging thumbnails after upload if the sequence needs adjusting.
Page settings worth choosing deliberately
Page size. "Fit to image" sizes the PDF page to match each image's dimensions exactly — no white borders, no cropping. This is the right choice for photographs, designs, and anything where you want the image to fill the page. "A4" or "Letter" forces standard document dimensions, which works better when the PDF will be printed alongside other documents or submitted to a system that expects standard page sizes.
Orientation. Portrait for most document scans and vertical images. Landscape for wide images, screenshots, or anything wider than it is tall. A batch with mixed orientations is worth sorting — some tools apply a single orientation to all pages, which will rotate landscape images incorrectly if you've selected portrait.
Margins. No margin keeps images edge-to-edge, which suits photos and full-bleed designs. A small margin gives text-heavy pages some breathing room from the edge and makes printed output look less cramped.
After conversion
If the resulting PDF is larger than expected — common when converting high-resolution photographs — running it through Portimg's PDF compressor usually reduces the file size substantially without a visible change in quality at normal viewing sizes. This matters when the PDF will be shared by email or uploaded to a form with a file size limit.
If the PDF needs a password before sharing — for contracts, personal documents, or anything sensitive — Portimg's PDF encryption tool adds one after conversion. This is a separate step from the image-to-PDF conversion itself.
When this fits into a larger workflow
Image-to-PDF conversion most often sits at the end of a document preparation process: photographs are taken or scans are made, images may need background removal or resizing, then everything gets combined into one file. If any images need editing before conversion — adjusting contrast on a dark scan, removing a background, resizing to consistent dimensions — those steps are worth completing before uploading to the converter rather than after, since you can't easily edit individual pages within a PDF without specialised software.
For the reverse workflow — converting a PDF back into individual images — Portimg's PDF to image tool handles that if you need pages as separate files for use elsewhere.