You have a PNG screenshot or a batch of scanned images and need them in PDF. Maybe it’s for a job application, a school assignment, or just because someone asked for “the document as PDF.” Whatever the reason, you don’t need to pay for Adobe Acrobat to do this.
I tested 7 different methods over the past two weeks – online tools, desktop apps, and built-in OS features. Some handle single files, others let you batch-convert 20+ PNGs into one organized PDF. Here’s what actually works in 2026, with real limits and gotchas for each option.
If you work with PDFs regularly, check out our full roundup of the best free PDF editors – it covers editing, annotating, and everything beyond basic conversion.
Quick Comparison Table
| Tool | Platform | Batch Convert | Free Limit | Max File Size | Quality Loss |
|---|---|---|---|---|---|
| ILovePDF | Web | Yes (up to 20) | 2 tasks/day | 25 MB | None |
| Smallpdf | Web | Yes | 2/day | 5 GB (paid) | None |
| PNG2PDF.com | Web | Yes (up to 20) | Unlimited | 50 MB total | None |
| Adobe Acrobat Online | Web | No | 1/day | 100 MB | None |
| macOS Preview | Mac | Yes | Unlimited | No limit | None |
| Print to PDF (Windows) | Windows | Yes (via Print) | Unlimited | No limit | Slight |
| Google Drive | Web | No | Unlimited | 5 MB/image | None |
1. ILovePDF – Best for Batch Conversion
ILovePDF is the tool I reach for when I need to merge 10+ PNGs into a single PDF. The interface is dead simple: drag files in, rearrange the order if needed, click convert.
How to use it
- Go to ilovepdf.com and select “Image to PDF”
- Upload your PNG files (drag and drop works)
- Rearrange page order by dragging thumbnails
- Choose page size (A4, Letter, or “Same as image”)
- Set margins and orientation
- Click “Convert to PDF” and download
The “Same as image” option is the one you want if your PNGs are screenshots or scans – it keeps the exact dimensions without adding white borders. Most people miss this and end up with tiny images centered on A4 pages.
What’s good
- Handles up to 20 files at once on the free tier
- Page orientation auto-detection actually works
- No account required for basic conversion
- Also has tools for compressing the output PDF after conversion
What’s not
- Free tier caps at 2 tasks per day – on the third attempt you hit a paywall
- Premium costs $7/month (or $48/year)
- 25 MB file size limit on free tier
2. PNG2PDF.com – Completely Free, No Limits
Here’s the thing about PNG2PDF.com: it does exactly one job and does it for free. No signup, no daily limits, no upsells. I’ve converted hundreds of files through it and never once hit a restriction.
How to use it
- Go to png2pdf.com
- Click “Upload Files” or drag your PNGs in
- Wait for upload (processing happens client-side)
- Click “Combined” to get one PDF with all images, or download individual PDFs
The conversion happens in your browser – your files don’t actually upload to a server. I verified this by disconnecting WiFi mid-conversion on a small file and it still worked. That’s a nice privacy bonus.
What’s good
- Genuinely free with no daily cap
- Client-side processing means better privacy
- Up to 20 files per batch
- No watermarks on output
What’s not
- 50 MB total upload limit per session
- No page size customization – uses original image dimensions
- Interface feels outdated compared to ILovePDF
- Can’t reorder pages before converting
3. Smallpdf – Cleanest Interface
Smallpdf is the tool that always comes up first in search results, and honestly, the interface deserves the ranking. Everything feels polished. But the free tier is tight – 2 conversions per day, and they really push the Pro plan ($12/month).
How to use it
- Go to smallpdf.com/png-to-pdf
- Drop your PNG file(s)
- Adjust page size and margins
- Click “Convert” and download
One thing Smallpdf does better than others: the margin and sizing controls are visual. You see a live preview of how your image sits on the page before converting. Saves a round trip if you’re picky about layout.
What’s good
- Best UI/UX of any online converter I tested
- Live preview before conversion
- Integrates with Google Drive and Dropbox for direct upload/save
What’s not
- 2 free tasks per day, then $12/month for Pro
- The free version now shows ads between steps
- Processing is server-side, so large files take longer
4. Adobe Acrobat Online – When You Need the “Official” Option
Adobe’s free online converter exists, and it works fine. Not great, not terrible. You get exactly one free conversion per day without an account, or a few more if you sign in with a free Adobe ID. The output is clean and compatible with everything.
How to use it
- Go to adobe.com/acrobat/online/png-to-pdf.html
- Upload your PNG
- Wait for conversion (takes 5-10 seconds)
- Download the PDF
The big downside: no batch conversion on the free tier. One file at a time. If you need to convert a folder of PNGs, this isn’t the right tool unless you’re paying for Acrobat Pro ($22.99/month).
What’s good
- Adobe compatibility guarantee – the PDF will open everywhere
- Handles files up to 100 MB
- Clean output with proper PDF metadata
What’s not
- 1 free conversion/day without an account
- No batch processing on free tier
- Slow compared to lighter tools
- Pushes Acrobat Pro subscription aggressively
5. macOS Preview – Best Free Desktop Option (Mac)
If you’re on a Mac, you don’t need any third-party tool. Preview does PNG to PDF natively, and it handles batch conversion through a method most people don’t know about.
Single file conversion
- Open the PNG in Preview
- Go to File > Export as PDF
- Choose save location and click Save
That’s it. Three steps, zero internet required.
Batch conversion (multiple PNGs to one PDF)
- Select all your PNG files in Finder
- Right-click > Quick Actions > Create PDF
- A new PDF appears in the same folder with all images as pages
Alternatively, open all PNGs in Preview, select all in the sidebar (Cmd+A), then File > Print > PDF > Save as PDF. This gives you more control over page sizing.
What’s good
- Built into macOS, no download needed
- No file size limits
- Works offline
- Quick Actions method handles batch conversion smoothly
What’s not
- Mac only
- No margin or page size controls in the Quick Actions method
- Page order follows alphabetical filename sorting
6. Microsoft Print to PDF (Windows 10/11)
Windows has a built-in PDF printer that works with any image viewer. Not as elegant as macOS Preview, but it gets the job done without installing anything.
How to use it
- Open your PNG in Photos or any image viewer
- Press Ctrl+P to open the print dialog
- Select “Microsoft Print to PDF” as the printer
- Choose paper size and orientation
- Click Print and select where to save
For multiple PNGs
- Select all PNG files in File Explorer
- Right-click the first selected file > Print
- Choose “Microsoft Print to PDF”
- All selected images merge into one PDF
Fair warning: the Print to PDF method can slightly reduce image quality because it runs through the print rendering pipeline. For screenshots and documents, you won’t notice. For high-resolution photography, consider using an online tool that preserves the original quality.
What’s good
- Built into Windows 10 and 11
- Works offline
- No file limits
What’s not
- Slight quality reduction through print pipeline
- Limited layout controls
- Page order depends on file selection order (can be unpredictable)
7. Google Drive – The Workaround Method
This one is more of a trick than a feature, but it works. Google Drive can open images in Google Docs, which you can then export as PDF. Useful if you’re already in the Google ecosystem and don’t want to open another tab.
How to use it
- Upload your PNG to Google Drive
- Right-click > Open with > Google Docs
- The image embeds in a document
- File > Download > PDF Document
Honestly, this is the slowest method on this list. But if you’re working with files already in Drive and need a quick PDF for sharing, it saves a step. For anything involving more than 2-3 images, use ILovePDF or PNG2PDF.com instead.
Which Method Should You Use?
Let me save you some time:
- Batch converting 5+ PNGs into one PDF: ILovePDF or PNG2PDF.com
- Single file, quick conversion: macOS Preview (Mac) or Print to PDF (Windows)
- Privacy matters and you don’t want files on a server: PNG2PDF.com (client-side) or desktop tools
- Need the nicest interface: Smallpdf
- Converting PNGs regularly (daily): macOS Preview or ILovePDF Premium
For most people, PNG2PDF.com is the answer. Free, no limits, no account needed. If you’re on Mac, Preview is even faster since it’s already on your computer.
Need to do the reverse? We have guides for converting PDF to PNG and converting any image to PDF as well.
Tips for Better PNG to PDF Conversion
Name your files before converting. Most tools use filenames for page ordering. If your PNGs are named IMG_4521.png through IMG_4535.png, they’ll sort correctly. But if you have a mix like “scan.png” and “page2.png,” the order in your PDF might surprise you. Rename them with a numerical prefix (01_, 02_, 03_) before uploading.
Check the page size setting. The default in most tools is A4 or Letter. If your PNG is a widescreen screenshot (1920×1080), it’ll get shrunk to fit a tall page with big margins. Look for an “original size” or “fit to image” option.
PNG transparency becomes white in PDF. If your PNG has a transparent background (common with logos and design exports), the transparent areas become white in the PDF. This is normal and expected – PDF doesn’t support transparency the same way PNG does.
Compress after converting if needed. Some of these tools produce large PDFs because they embed the full-resolution PNG data. If file size matters (email attachments, upload limits), run the output through a PDF compressor after conversion.
Frequently Asked Questions
Can I convert PNG to PDF without losing quality?
Yes. Tools like ILovePDF, Smallpdf, and PNG2PDF.com preserve the original PNG resolution during conversion. The PDF acts as a container for the image, so there is no recompression or quality loss unless you specifically choose to compress the output file.
Is it free to convert PNG to PDF online?
Most online converters offer free PNG to PDF conversion with daily limits. ILovePDF allows 2 free tasks per day, Smallpdf gives 2 free conversions per day, and PNG2PDF.com is completely free with no limits. Built-in OS tools like macOS Preview and Windows Print to PDF are always free with no restrictions.
How do I combine multiple PNG images into one PDF?
Upload all your PNG files to ILovePDF or PNG2PDF.com and they will merge them into a single PDF automatically. On macOS, select all PNGs in Finder, right-click, choose Quick Actions > Create PDF. On Windows, select all images, right-click the first one, and choose Print, then select Microsoft Print to PDF.
What is the maximum file size for free PNG to PDF conversion?
It varies by tool. ILovePDF free tier supports files up to 25 MB. Smallpdf handles up to 5 GB on paid plans but limits free users. PNG2PDF.com supports up to 20 files at a time with a 50 MB total limit. Desktop tools like Preview and Print to PDF have no file size restrictions.
Is PNG to PDF conversion better than JPG to PDF?
PNG to PDF preserves transparency and lossless quality, making it better for screenshots, diagrams, logos, and text-heavy images. JPG to PDF produces smaller file sizes but loses transparency and some image detail. Use PNG when quality matters, JPG when file size matters.