Flint PDF

Convert PNG to PDF

Bundle PNG files into a clean, shareable PDF. Browser-based, no install.

  • Browser-based — no install
  • Files private to your account
  • Up to 250 MB on Pro

Drop in your PNG file

Or upload any PDF, Word, Excel, PowerPoint, JPG, or PNG — we'll convert it to PDF either way.

Supported: PDF · DOCX / DOC · XLSX / XLS · PPTX / PPT · JPG / JPEG · PNG

Stitch PNG images into a PDF without losing any quality. PNG keeps text crisp and lines sharp, making it the best choice for screenshots, line art, and design assets you want to bundle into one file.

How it works

Right in your browser, no install

Flint PDF runs entirely in your browser. Drop a file in, do the thing, get the file out.

  1. 1

    Pick your PNG files

    Drop in one or more PNGs. The browser handles everything client-side — your files never leave your machine for this step.

  2. 2

    Lossless conversion

    Each PNG embeds as a page at its natural resolution — no quality loss, sharp text and lines stay sharp.

  3. 3

    Open or keep editing

    A single PDF is saved to your Flint library. Share it as-is, or jump into the editor to annotate, sign, or reorder pages.

What it's for

Built for real work

Design portfolios

Bundle screenshots of your work into a shareable, printable PDF.

Documentation

Combine annotated screenshots into a step-by-step PDF guide.

Visual reports

Compile charts and dashboards exported as PNG into a single deliverable.

FAQ

Frequently asked questions

Why use PNG over JPG?
PNG is lossless, so screenshots, text, and line art stay crisp. JPG re-compresses the image and can blur fine detail.
Can I combine multiple PNGs into one PDF?
Yes — pick any number of files and they become consecutive pages of a single PDF, in the order you picked them.
Does it work for transparent PNGs?
Yes. PNGs with transparency render on a white page background. Full transparent-background PDFs are on the roadmap.
Is it free?
You can try the conversion in the browser without an account. Downloading the resulting PDF requires Flint Pro.
Are my files private?
Yes. The conversion runs locally in your browser; only the final PDF is saved to your Flint library.
What's the maximum file size?
Flint Pro accepts PDFs up to 250 MB. For very large image batches, save in chunks.
Can I convert PDF back to PNG?
Yes — our PDF to PNG converter saves every page as a lossless PNG.

More from Flint PDF

More PDF tools

Built browser-side, share the same editor.

Edit

Change what's on the page.

Organize

Rearrange or combine pages and files.

Export

Optimize or convert for sharing.

Convert PNG to PDF — Free Online Lossless PNG-to-PDF — Flint PDF