PNG to PDF Converter

PNG files arrive here from different jobs than photos. A screenshot set documents a workflow, a logo sheet goes to a print shop, a stack of exported slides becomes a handout. Two questions matter far more for PNG than for other formats: what happens to transparent backgrounds, and whether the conversion throws away the lossless quality that made PNG the right format in the first place. Most converters answer neither — this page makes both explicit, and lets you verify the result before downloading.

How to convert PNG to PDF on this page

1. Choose your PNG files. Use the picker or drop files into the upload area — up to 30 images, one per page. JPG, WebP and GIF files are accepted too if a batch is mixed.
2. Put the pages in order. The numbered cards are the exact sequence of the finished document. Drag a card, or use the arrow buttons on a touch screen.
3. Fix any sideways page. Rotate an individual image in 90-degree steps.
4. Choose the page layout. A4, US Letter, US Legal or Match each image, with automatic, portrait or landscape orientation and margins from None to Wide.
5. Choose the image fit. Fit whole image keeps every edge visible; Fill the page removes white borders but can crop — the form warns you first.
6. Choose the page encoding. Lossless pages keep transparency and avoid new compression; Balanced and High-quality PDF use JPEG for smaller files.
7. Name the document, optionally add page numbers, then select Create PDF.
8. Inspect the result — preview, crop report, transparency notes and file size — then download.

The original PNG files are never modified, and changing any source or setting clears the previous result so the preview always matches the current controls.

Merge and combine multiple PNGs into one PDF

The most common reason people land here is not a single image — searches like merge PNG to PDF, combine PNG to PDF and multiple PNG to PDF describe one job: a folder of separate graphics should become a single ordered document. Exported design frames, chapter illustrations and page-by-page scans all follow this pattern.

Merging is the default behavior on this page: every image you add becomes one page in one PDF, and the order you see before converting is the order in the file. Check the sequence before you convert — exports named frame-1, frame-2, frame-10 do not always sort the way a reader expects, and reordering afterwards means opening a second tool.

Two details make large batches manageable here:

• The numbered list is authoritative. What the cards show is what the PDF contains; drag or use arrow buttons until the narrative reads correctly.
• Orientation can differ per page. A wide architecture diagram keeps its landscape page between portrait screenshot pages, under one paper standard.

If you specifically need one separate PDF per image rather than a merged document, that is a different output mode this page does not offer — a dedicated splitter or a converter with a separate-files option fits that task better.

What happens to transparent backgrounds

Transparency is the defining feature of PNG, and the least documented step of PNG-to-PDF conversion across the web. Converters that silently flatten transparency onto white break logos, icons and interface mockups — users regularly discover this only after sending the file, as this PDF24 forum thread shows.

This page tells you what will happen, in three places:

• Before conversion, a badge counts the sources that contain transparent pixels, so a transparent logo never passes unnoticed.
• In the encoding choice, the behavior is explicit: Lossless pages keep transparent pixels; Balanced and High-quality PDF use JPEG, which cannot store transparency, so those pixels are composited onto white.
• In the result, the report repeats how many transparent sources the document contains.

One honest clarification: the PDF page itself is always white. With Lossless pages the transparent pixels survive inside the page image — the generated file stores an alpha mask — but a viewer still shows the white page behind them, exactly as a transparent PNG displays over a white background. What you keep is the ability for the graphic to sit correctly on other backgrounds in further layout work, and the certainty that no opaque white box was baked into the image edges.

Convert PNG to PDF without losing quality

PNG is a lossless format: every pixel is stored exactly. People search for PNG to PDF without losing quality because many converters quietly recompress pages as JPEG, trading away the sharp text edges and flat colors that PNG preserves — some even advertise the resulting size reduction as a feature.

The page encoding control is where this tool answers that need:

• Lossless pages — each page is encoded as PNG. No JPEG compression is applied at all, colors and edges survive bit-for-bit through the page preparation, and transparency is kept. The cost is file size: detailed images make large pages.
• High-quality PDF — JPEG at 94%. Visually close for most screenshots, noticeably smaller for photo-like content.
• Balanced PDF — JPEG at 82%. The practical default when the document is long and the destination has size limits.

This is the direct link between the guide and the form: if the PDF must preserve a logo's transparency or a diagram's hairlines, choose Lossless pages before converting; if the goal is a light attachment of thirty screenshots, choose Balanced and check the reported file size. The size shown in the result panel is the actual generated file, not an estimate.

Choose the page size, orientation and margins

The page setting controls the PDF page itself, independently of the image's pixel dimensions.

Auto per page orientation follows each image's shape, so a landscape diagram and a portrait screenshot can share one document correctly without manual sorting. Margins — None, Narrow (0.25 in), Normal (0.5 in) or Wide (0.75 in) — add white space around the image; a margin helps when the PDF will be printed and filed, None suits full-bleed graphics. With Match each image, the pixels-per-inch value sets the physical page size computed from the same pixels — it changes the printed size, not the image data.

For screenshots and diagrams where every label matters, keep Fit whole image: the complete graphic stays visible with possible white space on two sides. Fill the page covers the paper edge-to-edge and crops where the ratios differ — the form estimates how many pages would crop before you convert, and the result report names them.

Worked example: screenshots and a transparent logo

A realistic batch: a desktop screenshot (2880 × 1800), a phone screenshot (1440 × 3120), and a square 1024 × 1024 logo with transparent corners. Choose A4, Auto per page, Narrow margin and Fit whole image for the screenshots; the logo gets Match each image at 150 pixels per inch with Lossless pages.

Computed with the tool's own layout functions, the result is:

The transparency claim was verified end to end during development: a PNG with transparent corners was run through the lossless assembly path, and the generated PDF stores an alpha mask for the page image — the transparent pixels survive. The same file reloads as a valid PDF with the chosen document title in its metadata.

Page dimensions and scales above are verified outputs of the tool's layout calculations. Final file size depends on image content and the chosen encoding; read it from the result panel.

What this PNG to PDF converter does not do

Clear limits save a wasted upload elsewhere. This page does not:

• insert images into an existing PDF or edit PDF pages — add PNG to PDF in that sense is a different task;
• split a batch into one separate PDF per image;
• run OCR — text visible in a screenshot stays pixels, not searchable text;
• target an exact output size such as 200 KB;
• import files from Google Drive or Dropbox;
• preserve the original PNG file bytes untouched — pages are freshly prepared, and original file metadata is not copied;
• guarantee acceptance by a specific third-party form.

For photographs rather than graphics, the JPG to PDF converter frames the same workflow around camera files, and the Image to PDF converter handles mixed-format batches.

Established alternatives work differently: png2pdf.com is deliberately minimal — fast and free, but with no ordering, no layout options and a twenty-image cap; Smallpdf PNG to PDF and FreeConvert PNG to PDF offer page-size and margin controls as server-side services with their own free-tier limits. None of the reviewed pages states what happens to transparent backgrounds, and none offers an explicit lossless mode — the practical distinction of this page is stating both behaviors up front, processing locally in the browser, and showing the generated PDF before download.

Troubleshooting common PNG to PDF problems

A logo or icon gained a white box

You used Balanced or High-quality PDF, which encode pages as JPEG and flatten transparency onto white. Recreate the PDF with Lossless pages to keep the transparent pixels.

The PDF is too large for the destination

Lossless pages are big by design. Switch to Balanced PDF for photo-like images, or reduce oversized sources with the image compressor first. This tool reports the actual size but does not target an exact KB or MB value.

The pages are in the wrong order

Rearrange the cards with drag-and-drop or the arrow buttons, then create the PDF again. Order and setting changes clear the previous result on purpose.

Text or edges are cut off

You are using Fill the page. Switch to Fit whole image, or rotate the source so its shape matches the paper. Recreate and confirm the report shows no cropped pages.

A file is rejected

Confirm each file is a PNG, JPG, WebP or GIF image no larger than 40 MB, with no side longer than 12,000 pixels and no more than 60 megapixels, and that the batch stays within 30 images and 200 MB in total. Renaming an unsupported file to .png does not make it a valid image.

The browser struggles with a large batch

Decoded images and the finished PDF are held in browser memory — Lossless pages need the most. Split the batch, choose Balanced PDF or close memory-heavy tabs.

PNG to PDF FAQ

Is this PNG to PDF converter free?

Yes. This page converts and downloads the PDF without a sign-up, payment or watermark step. The conversion runs locally in your browser rather than through a base97 upload service.

Can I merge multiple PNG files into one PDF?

Yes. Add up to 30 images, arrange them in the required order and create one PDF. Each image becomes exactly one page.

Will transparent PNG backgrounds stay transparent?

With Lossless pages, the transparent pixels are kept in the PDF page image — the generated file stores an alpha mask. The PDF page itself is still white, so viewers show white behind those pixels. Balanced and High-quality modes use JPEG pages and flatten transparency onto white.

Does converting PNG to PDF lose quality?

Not if you choose Lossless pages: each page is encoded as PNG, so no JPEG compression is applied. Balanced and High-quality modes re-encode pages as JPEG at 82% or 94%, which trades some fidelity for a smaller file.

Can I add a PNG to an existing PDF?

No. This tool creates a new PDF from image files. It does not open an existing PDF or insert images into one.

Research and editorial notes: Tool behavior was checked against the base97 implementation on October 3, 2026, including an end-to-end run in which a transparent PNG kept its alpha mask in the generated PDF. Page-image encoding behavior was reviewed against MDN documentation for toBlob(); PDF assembly uses pdf-lib. Competitor descriptions reflect their official product pages as observed on the research date — including the documented twenty-image cap on png2pdf.com and iLovePDF's published free-tier limits — and explain scope rather than claim universal superiority.