Most PDF editors want $20/month just to let you drop a logo into a contract. I spent the last two weeks testing every free option I could find for adding images to PDF files. Some tools crushed it. Others corrupted my formatting or slapped watermarks on the output. Here are the seven that actually deliver.
Need a full-featured editor for more than image insertion? Our roundup of the best free PDF editors covers everything from annotation to form filling.
Quick Comparison: Best Free Tools to Add Images to PDF
| Tool | Best For | Free Limit | Signup Required | Offline Option |
|---|---|---|---|---|
| PDF24 Tools | Unlimited free use, no catches | None | No | Yes (desktop app) |
| Smallpdf | Fast one-off edits | 2 tasks/day | No | No |
| iLovePDF | Simple drag-and-drop | 1 task then limits apply | No | Yes (desktop app) |
| Sejda | Precise positioning | 3 tasks/hour, 200 pages max | No | Yes (desktop app) |
| Adobe Acrobat Web | Maximum compatibility | Limited free edits | Yes | No |
| Preview (Mac) | Mac users, no upload needed | Unlimited | No | Yes (built-in) |
| LibreOffice Draw | Complex edits, batch work | Unlimited | No | Yes |
1. PDF24 Tools – Genuinely Free, No Strings
PDF24 is the tool I keep coming back to. It’s run by a German company called Geek Software, and they’ve kept every single feature free since launch. No daily task caps. No watermarks. No “upgrade to remove our branding” tricks. The business model runs on their desktop app for Windows, but the online editor works identically.
To add an image: open the PDF Editor at tools.pdf24.org, upload your file, click the image icon in the toolbar, select your JPG or PNG, and place it on the page. You can resize by dragging the corners and move it anywhere on the page. The output quality matched my original file exactly in every test I ran.
One thing I noticed – PDF24 processes everything server-side but deletes files after one hour. They’re transparent about this in their privacy policy. If you’re working with sensitive documents like medical records or financial statements, their desktop app keeps everything local.
What I liked
- Zero restrictions on the free tier – I processed 14 files in one session without hitting any wall
- Keeps original formatting intact, including fonts and vector graphics
- File deletion after 1 hour (good privacy practice)
- Desktop app available for fully offline use
What could be better
- Interface looks dated compared to Smallpdf or Sejda
- No mobile app
2. Smallpdf – Polished but Limited
Smallpdf has the cleanest interface of any online PDF tool. Everything feels intuitive. Upload, click “Add Image,” place it, download. Done in under 30 seconds.
The catch: free users get two tasks per day. After that, you hit a paywall. For occasional use – maybe you need to add a company logo to a single contract once a week – this is fine. For anything more, you’ll burn through those two tasks fast.
I tested it with a 47-page annual report where I needed to insert a chart on page 23. Smallpdf handled it without breaking the existing layout. Page load times were under 4 seconds even for that larger file. The image snapped to a grid, which helped with alignment but felt restrictive when I wanted to place something at an odd angle.
What I liked
- Fastest upload-to-download time of any tool tested (about 25 seconds for a 5-page PDF)
- Image snapping and alignment guides
- Supports JPG, PNG, GIF, and SVG insertion
What could be better
- 2 free tasks per day is tight if you’re working on multiple documents
- No way to insert images on multiple pages at once
3. iLovePDF – Straightforward and Fast
iLovePDF takes a slightly different approach. Instead of opening a full editor, it gives you a simplified canvas where you upload your PDF, then drag images onto specific pages. The workflow is more “stamp an image on top” than “edit the PDF content.” For most use cases – adding a signature scan, a watermark, a logo – that’s exactly what you want.
Free tier limits kicked in after my first task in a session, but clearing cookies or using a different browser got around this during testing. Not recommending that as a daily strategy, just noting how it works. The 25 MB file size cap on the free plan means you’ll need to compress your PDF first if you’re working with image-heavy documents.
What I liked
- Image placement is dead simple – drag, resize, done
- Keeps file size reasonable after export
What could be better
- Can’t edit existing content around the image
- Limited control over image opacity or rotation
4. Sejda PDF Editor – Best for Precise Placement
If exact positioning matters to you – like lining up a product photo with existing text columns or placing an image precisely 2 cm from the top margin – Sejda is your tool. It shows coordinates as you drag, lets you input exact pixel positions, and supports layer ordering so your image goes behind or in front of existing content.
I used Sejda to insert technical diagrams into a 180-page engineering spec. Each diagram needed exact placement relative to figure captions that were already in the PDF. Sejda handled it without any issues, though the interface lagged slightly around page 150. The free tier gives you 3 tasks per hour with a 200-page and 50 MB limit per file.
Sejda also has a desktop version that removes the hourly task restriction. It’s free for the first week.
What I liked
- Pixel-level positioning controls
- Layer management (front/back ordering)
- Handles large documents better than most online tools
What could be better
- Gets slow on PDFs over 100 pages
- 3 tasks per hour can be frustrating during heavy editing sessions
5. Adobe Acrobat Web – The Safe Choice
Adobe built the PDF format, so compatibility is never a question here. The free online version of Acrobat lets you add images to PDFs, though the workflow isn’t as streamlined as dedicated tools like PDF24 or Smallpdf.
You need an Adobe account (free to create). Once logged in, upload your PDF, use the “Add Image” option in the edit toolbar, and position your file. The rendering is pixel-perfect – no surprise there. What did surprise me is that Adobe now limits free editing actions more aggressively than they did a year ago. You get a handful of free operations before the tool prompts you toward an Acrobat Pro subscription at $19.99/month.
For a one-time edit where you absolutely cannot risk formatting issues, Adobe is the safest pick. For regular use on free tier, PDF24 or Sejda make more sense.
What I liked
- Perfect rendering – what you see is exactly what you get
- Works with every PDF I threw at it, including password-protected files (after entering the password)
What could be better
- Free tier is increasingly restricted
- Requires account creation
- Slower upload times compared to competitors
6. Preview on Mac – Already on Your Machine
Mac users often don’t realize Preview can do this. Open your PDF in Preview. Open your image in Preview too (or any other app). Copy the image (Cmd+C). Go back to the PDF. Paste (Cmd+V). The image drops onto the current page and you can drag it wherever you want.
Honestly, for quick jobs this beats every online tool. No upload, no download, no privacy concerns. Everything stays on your machine. The image quality stays sharp, and Preview preserves the original PDF structure surprisingly well.
The limitation: you can’t control layering. The pasted image always sits on top of existing content. You also can’t set transparency or rotate at arbitrary angles (only 90-degree increments). For complex layouts, you’ll need something like LibreOffice Draw. But for slapping a logo on page one of a proposal? Preview gets it done in 10 seconds flat.
7. LibreOffice Draw – Power User Territory
LibreOffice Draw opens PDFs as editable documents. Every element – text, shapes, images – becomes individually selectable and movable. Adding a new image is as simple as Insert > Image from the menu bar.
I won’t sugarcoat this: LibreOffice sometimes breaks complex PDF layouts on import. Tables shift. Fonts substitute. Headers move a pixel or two. For simple PDFs – text-heavy documents, basic forms, single-column layouts – it works great. For anything with complex formatting, test the output carefully.
Where LibreOffice really shines is batch work. If you need to add the same logo to 50 PDF files, you can write a macro to automate the entire process. No other free tool on this list offers that kind of programmability. It also runs entirely offline on Windows, Mac, and Linux.
What I liked
- Full editing control – move, resize, crop, rotate images freely
- Macro support for batch processing
- Works on Windows, Mac, and Linux
- Completely free and open source
What could be better
- PDF import occasionally breaks complex layouts
- Steeper learning curve than online tools
- Exported PDFs sometimes have slightly larger file sizes
Tips for Keeping File Size Down
Adding images to PDFs can bloat file sizes fast. A 200 KB PDF can jump to 15 MB after inserting a few high-resolution photos. Here’s what helps:
- Resize images before inserting. If your image will display at 3 inches wide on the page, you don’t need a 6000-pixel-wide source file. Scale it down to around 900 pixels wide (300 DPI for print, 150 for screen-only).
- Use JPG for photos, PNG for graphics. Photos compress dramatically better as JPG. Logos and diagrams with flat colors stay sharper as PNG.
- Compress afterward. After inserting your images, run the output through a PDF compression tool. PDF24 and iLovePDF both offer this as a separate function. I typically see 40-60% size reduction without visible quality loss.
- Avoid BMP and TIFF. These uncompressed formats will inflate your PDF dramatically. Convert them to JPG or PNG first.
Which Tool Should You Pick?
For most people, PDF24 Tools is the answer. No limits, no signup, solid output quality. If you’re on a Mac and the edit is simple, just use Preview – it’s already there. Need exact positioning for technical documents? Go with Sejda. Need to process dozens of files? Install LibreOffice Draw and write a macro.
Smallpdf and iLovePDF are fine for occasional one-off edits, but the daily task limits make them impractical for anything recurring. Adobe Acrobat Web is the safest choice for maximum compatibility, but the free tier keeps shrinking.
If you also need to add text to your PDF, most of these tools handle that too. Check our dedicated guide for text-specific tips and tool comparisons.
Frequently Asked Questions
Can I add an image to a PDF without Adobe Acrobat?
Yes. PDF24 Tools, Smallpdf, iLovePDF, and Sejda all let you insert images into PDFs directly in your browser without installing anything. On Mac, the built-in Preview app handles this natively. LibreOffice Draw is a free desktop alternative that works on Windows, Mac, and Linux. You don’t need Adobe Acrobat for basic image insertion. For more options, see our list of free PDF editors.
Does adding images to a PDF increase the file size?
Yes, always. How much depends on the image format and resolution. A single high-resolution photo can add 2-5 MB to your PDF. To minimize bloat, resize your images before inserting them (900 pixels wide is usually enough for on-screen viewing) and use JPG for photos. You can also compress the final PDF afterward using tools like PDF24 or iLovePDF to recover 40-60% of the added size.
Can I add images to a PDF on my phone?
Yes. Both Smallpdf and iLovePDF work in mobile browsers without installing an app. On iPhone, the built-in Files app has basic PDF markup that lets you add stamps and drawings but not arbitrary images. For full image insertion on mobile, the iLovePDF app (free on iOS and Android) is the most reliable option I’ve tested.
Will adding an image to a PDF mess up the existing layout?
With online tools like PDF24, Smallpdf, iLovePDF, and Sejda, your image sits as an overlay on top of the existing content – the underlying layout stays untouched. The only tool on this list that might shift existing elements is LibreOffice Draw, because it re-renders the entire PDF as an editable document during import. If preserving layout is a priority, stick with the online editors.
What image formats can I insert into a PDF?
All seven tools on this list support JPG and PNG. Most also accept GIF, BMP, and TIFF. Smallpdf additionally supports SVG insertion, which is useful for logos and vector graphics that need to stay sharp at any zoom level. For best results, use JPG for photographs and PNG for graphics, logos, and screenshots with text.