A landlord asks for a copy of last month's utility bill. You photograph it on your phone. They want a PDF, not a JPG. Or you're applying for a job and the portal accepts a single combined document — but you have three scans of three different certificates. Or you've photographed a long receipt for an expense claim and need it as one tidy file. This guide is about the boring, daily task of getting an image (or a stack of them) into a PDF — using Flint's Image to PDF converter, plus what to do once you've got the file.
Why people convert images to PDF
Images are great. PDFs solve a slightly different problem. The three reasons we see most often:
- It's what the form wants. Government portals, university applications, job sites, mortgage brokers, insurance claims — most of them ask for a PDF. A pile of JPGs simply won't go through.
- Multiple photos belong in one file. Three pages of a contract photographed on your phone is more useful as one three-page PDF than three separate images. The reader can flip through it linearly.
- Better for archives and email. A PDF travels well — it opens in any browser, any phone, any email client, any document viewer. JPGs sometimes get stripped or recompressed by mail servers; a PDF attachment goes through cleanly.
Common scenarios this tool handles well
The phone-scan receipt
You took a photo of a receipt. Or two photos because it was long. The expense system wants a single PDF. Drop both images in, reorder if necessary, convert — done.
The job application bundle
Photographs or scans of qualifications, certificates, references, ID. Most application portals want a single combined attachment. Image to PDF is the path: each image becomes a page, in the order you drop them. If you've already got some pages as PDFs and others as photos, convert the photos first, then merge them with the rest.
The whiteboard photo
Snapshot of a workshop whiteboard, or the wall of a warehouse, or the spec on a co-worker's screen. PDF is friendlier than a JPG for sharing in a project channel — you can drop a freehand annotation on it with Annotate PDF and send it on.
The scanned letter
Many flatbed scanners default to JPG output, one file per page. A three-page letter ends up as three JPGs nobody can read in order. Combine them into a PDF and you have a readable, archivable document.
How to convert images to PDF in Flint
Open the Flint Image to PDF tool. The tool runs in any browser — useful when you've got photos on your phone and don't want to install anything.
Drop your photos or scans in
Reorder if you need to
Land in the editor with a finished PDF
Useful follow-ups
Photos and scans tend to need a few extra touches before they're ready to send:
- Shrink before sending. Modern phones take huge photos. A four-page PDF of full-resolution shots can easily top 30 MB. Compress PDF brings it down to something email-friendly without turning your receipt into a smudge.
- Redact card numbers and personal info. A photographed receipt sometimes catches the last four digits of a card, a phone number, or a colleague's name. Use Redact PDF to strip them — actually remove the underlying content, not just paint a black box over the top.
- Combine with existing PDFs. If you also need an existing PDF in the same bundle (a cover letter, a reference form), merge them together into a single submission.
- Sign on the cover. Some forms expect a handwritten signature on the cover sheet. Drop one in with Sign PDF.
- Pull out a single page. Split PDF extracts an individual page if you only need to send one.
Other ways to do this
The Files app on iOS / Photos → Print → Save as PDF
On an iPhone, you can select photos in the Photos app, hit Share, then Print, then pinch out on the preview to get a Save to Files menu that exports a PDF. It works, but it's a fiddly five-step dance and you can't easily reorder pages. Flint is faster on more than two images.
Preview on macOS
Open all your images in Preview, then File → Print → Save as PDF. Reordering happens by dragging thumbnails in the sidebar. Fine for a quick job; lacks any of the post-conversion editing tools.
Microsoft Print to PDF (Windows)
Select images in Explorer, right-click → Print → Microsoft Print to PDF. Same pattern. Works, but every image becomes a full page with whitespace around it, which isn't always what you want.
Flint (the case for it)
Flint is the one to reach for when you're combining more than two images, when you need to reorder, when you're jumping between formats (some JPGs, some PNGs, some HEICs), or when the next step is something like redacting or compressing the result. The whole toolkit lives in one place; you don't pivot between apps.
Tips for a clean image-to-PDF result
- Crop before converting. A phone photo of a receipt sat on a kitchen table includes a lot of kitchen table. Crop in your photo app first so each page is just the document.
- Rotate to portrait. Phones don't always rotate sensibly. Check each image is the right way up before uploading.
- Take photos in even light. A receipt half in shadow scans badly. Lay it on a flat surface near a window — the result is dramatically more readable.
- For long documents, use scan mode. Both iPhone Notes and Google Drive have a built-in document scanner that flattens the image and removes the background. Use those for multi-page scans, then convert the result.
- Watch sensitive info. If your photo contains a card number, full name, or anything you don't want a stranger to see, redact it before you share the PDF.
Image to PDF: frequently asked questions
How many images can I combine in one PDF?
As many as you like, up to the 250 MB file-size limit on Pro. In practice, a 30- or 40-page document of phone photos sits comfortably under that ceiling.
Will the order be preserved?
Yes. The order in the upload list becomes the order in the PDF. Drag the thumbnails to rearrange before converting.
Are HEIC files from my iPhone supported?
Yes, directly. You don't need to convert them to JPG first. HEIC, JPG, PNG, WebP, TIFF, BMP and GIF all upload and convert without an extra step.
What page size will the PDF be?
Each image fits to A4 portrait by default with a small margin. If your image is landscape, it's rotated to fit — keeping the content the right way up for the reader.
Does Flint compress my images?
The conversion preserves the original image quality. If you want a smaller file afterwards, run the resulting PDF through Compress PDF; the image-aware setting is the one to use.
Is the file private?
Yes. Your images are uploaded to your own Flint library, converted, and stored there. We don't share, sell, or train on your data. Delete from My Documents when you no longer need them.
What's the maximum file size?
Flint Pro accepts files up to 250 MB.
Ready to convert?
Drop your photos or scans into Flint's Image to PDF converter. You'll have a single, ordered, sendable PDF in seconds — and the rest of the toolkit (compress, sign, redact, merge) is one click away when you need it.