Should you send a document as JPG or PDF?

The short rule

Follow what the form or recipient asks for first. That overrides everything else: a field that says "JPG, max 100 KB" will not take a PDF, and a request for "one PDF" will not be happy with six pictures. If the choice is yours, the table below is a good default.

Why PDF suits documents

A PDF keeps pages together in one file, in order, at a defined paper size. The recipient opens one file, scrolls, and prints it as expected on A4 or Letter. Several separate JPGs have to be opened one by one, can arrive in a mixed-up order, and print at whatever size the printer decides.

PDF is also the format people expect for filing: they can store one attachment for your whole application. And if you produce the PDF from a word processor, the text stays text, which means it can be searched and copied. A PDF made from photos is different: it holds pictures of pages, so the words cannot be searched. That is normal for scans, but it is worth knowing.

Why JPG is the right answer in some forms

Online forms often want a picture for a specific purpose: a face for an ID card, a signature for a record, a photo for a profile. They crop, resize or display it automatically, and a PDF cannot be handled that way. These fields often come with strict limits, such as a size under 100 KB or fixed dimensions. A compressed JPG is also usually smaller than the same photo as a PDF page, so it is easier to meet a small limit. Signature image upload and online application image requirements show the typical rules.

Turning JPGs into one PDF

If you have photos of a multi-page document, open Images to PDF, add the JPG, PNG or WebP files, order them, choose A4 or Letter, and download one PDF. It runs in your browser. The result is image-based, and transparent areas become white. If you want to merge it with PDFs you already have, use Merge PDF. A fuller walkthrough is in converting JPG to PDF.

If you must supply an image but have a PDF

WORDMIO does not convert PDF pages into images. The easy way is to take a screenshot or photograph of the page, or export the page as an image from the program that created the document. After that, Convert to JPG changes PNG or WebP to JPG, Crop image trims edges, and Compress image brings it under a size target. Note that JPG does not keep transparency; transparent areas turn white.

Size and readability

Whichever you pick, test readability at the end. Zoom to 100% and check the smallest text, stamps and numbers. A heavily compressed image can look fine as a thumbnail and blur on screen. Keep the original so you can start again at a gentler setting. If the file is for a size-limited form, shrinking the pictures before building the PDF is the reliable approach, because WORDMIO has no PDF compression. See compressing photos for documents and PDF too large to email.

Make the scan itself better

Format matters less than a clean capture. Photograph the page from straight above in even light, fill the frame, crop out the surroundings and rotate so it reads upright. The guide to scanning documents with your phone covers this, and homework photos to PDF shows a simple end-to-end example.

Frequently asked questions

Is PDF better than JPG for documents?

For multi-page or printable documents, yes. A PDF keeps pages together and at a fixed paper size. A JPG is better for single photos or when a form specifically asks for an image.

Can I send a JPG instead of a PDF for a job application?

Only if the employer allows it. If they ask for a PDF or one file, combine your pictures into a PDF first.

Does converting JPG to PDF keep the text searchable?

No. The pages in a PDF made from photos are pictures, and WORDMIO does not run OCR.

Which is smaller, JPG or PDF?

A single compressed JPG is often smaller than the same image as a PDF page. A PDF of many photos is roughly the combined size of the images.