Is this PNG to PDF converter really free?

Yes. Up to 5 files at a time, no signup, no catch. The free tier adds a small watermark to image output — Pro ($9.99/mo or $49/yr) removes it, raises the file size limit to 500 MB, and unlocks unlimited batch conversion.

Are my files uploaded to a server?

No — and you can verify it yourself. Open DevTools → Network tab, then convert a file. You'll see zero upload requests. Everything runs right in your browser. We never see your files.

How long does conversion take?

Usually 1–3 seconds for a typical file. The very first conversion on a fresh page load may take 5–20 seconds while the converter engine loads — after that it's instant. Your CPU does all the work locally.

What is the file size limit?

Free: up to 10 MB per file, 5 files per batch. Pro: up to 500 MB per file, unlimited batch. If you're working with large videos or RAW photos, Pro is built for that.

Can I batch convert multiple PNG files at once?

Yes — drop multiple files at once (or Ctrl/Cmd+click to select them) and they all convert in parallel. Free accounts handle up to 5 files per batch; Pro has no limit.

Will my document formatting survive conversion?

Standard formatting — text, headings, bold/italic, tables, and inline images — transfers reliably. Complex layouts with floating objects, custom fonts, or SmartArt may simplify. Always give the output a quick review before sharing.

Can I convert a password-protected document?

No — encrypted files can't be read without decryption, and we never ask for passwords. Remove the password protection first, then convert.

Can I combine multiple PNG files into one PDF?

Yes — select multiple PNG files at once and each becomes a page in the resulting PDF, in the order you selected them. Download the complete multi-page PDF when conversion is done.

Will transparent areas in my PNG become white in the PDF?

Yes. PDF doesn't support full transparency the way PNG does — transparent areas are filled with white in the output. If you need a specific background colour, add it to the PNG before converting.

How private is this converter?

Completely private — by design, not policy. There is no upload endpoint. Files are processed right inside your browser tab and disappear the moment you close it. We collect only anonymous page-view counts; your file content is never seen or stored.

PNG to PDF Converter — Free, Online, No Upload

How to convert PNG to PDF online

1
Drop your PNG file
Drag and drop your Portable Network Graphics file onto the converter, or click to browse your files. You can select up to 5 at once. Nothing leaves your device — conversion happens right here in the browser.
2
Hit Convert — it happens locally
Click Convert and watch it go. There's no upload, no server queue, no waiting. The converter runs Portable Network Graphics → Portable Document Format entirely in your browser tab. Most files finish in 1–3 seconds.
3
Download your PDF
Your Portable Document Format file is ready. Click Download, or grab a ZIP if you converted a batch. Close the tab and everything disappears — no copies kept anywhere.

PNG vs PDF: format overview

PNG

Portable Network Graphics

PNG Development Group (Thomas Boutell) · 1996

Compression: lossless
Color depth: 16-bit
Transparency: Yes

✓ Lossless compression — pixel-perfect quality
✓ Full alpha transparency (8-bit alpha channel)
✗ Large file sizes for photos

PDF

Portable Document Format

Adobe Systems (John Warnock) · 1993

Compression: lossless
Transparency: No

✓ Fixed layout — looks identical on every device
✓ Embeds fonts, images, and vector graphics

PNG magic bytes: 89 50 4E 47 0D 0A 1A 0A

PDF magic bytes: 25 50 44 46

Why convert PNG to PDF?

PNG is for images. PDF is for documents you want to share, email, or print. The most common reason people convert PNG to PDF: they have screenshots, scanned documents, or diagrams saved as image files and need to combine them into a single document for a submission or email.

One PNG becomes a one-page PDF. Multiple PNGs become a multi-page PDF — useful for sending a photo ID alongside a document, attaching multiple screenshots to a report, or bundling design mockups into a presentable package. The PDF preserves the exact pixel dimensions of your PNG and adds no compression — the image inside the PDF is identical to the source.

What PNG-to-PDF does not do: it doesn't make text searchable (the text inside your PNG image is still an image, not indexed text), and it doesn't reduce file size — PDFs wrapping large images will be similarly large.

Common reasons to convert PNG to PDF:

›Combining multiple screenshots into a single document for email or submission
›Turning a scanned ID, certificate, or form into a PDF a website or portal will accept
›Sending design mockups or wireframes as a single PDF instead of a folder of images
›Converting a diagram or chart into a document format for a report

Quality & file size: PNG to PDF

Typical file sizes: A PNG wrapped in a PDF is approximately the same size as the original PNG — the PDF container adds minimal overhead (typically under 5 KB). A 10 MB PNG becomes roughly a 10 MB PDF. PDF does not compress images further; it embeds them as-is. Multi-page PDFs from multiple PNGs will be approximately the sum of the individual PNG sizes.

Both PNG and PDF use lossless encoding, so no image quality is lost in conversion. The output PDF will render your PNG at exactly the same pixel dimensions and colour values as the source.

Transparency: PNG supports full alpha transparency. PDF (in practice for image-wrapping) does not — transparent areas in the PNG become solid white in the PDF output. If you need a specific background colour, add it to the PNG before converting.

Frequently asked questions

Privacy: how FormatDrop handles your files

Your PNG files are converted 100% inside your browser. They are never uploaded to our servers, never stored, and never seen by anyone other than you. This isn't a privacy policy claim — it's an architectural guarantee: our server has no endpoint that receives file bytes.