PDF to JPG troubleshooting: passwords, page limits, blurry output

Fixes for the problems people hit most often when converting a PDF at PDF to JPG. Everything below happens in your browser — the file is never uploaded — so most issues come down to the file itself or your device's memory.

"This PDF is password-protected, so it can't be opened to convert"

Cause: The PDF is encrypted with an open password, and a locked file can't be rendered to images.

1. Click Remove the password first → in the error message, or open Unlock directly.
2. Enter the PDF's password there to save an unlocked copy. You need to know the password — AttachKit can't crack or bypass one.
3. Convert the unlocked copy.

PDFs that only restrict printing or editing (an owner password rather than an open password) usually convert without any of this.

"This PDF has 412 pages — converting that many images at once can hang your browser"

Cause: The tool caps a single conversion at 300 pages. Every page becomes a full-resolution image held in memory at the same time, and several hundred of them can crash the tab — especially on phones.

1. Click Split it with the Pages tool → in the error message, or open Pages directly.
2. Export the document as smaller chunks (say, pages 1–250 and 251–412).
3. Convert each chunk separately and download each ZIP.

Images look blurry, or text has fuzzy edges

Cause: The default Standard resolution (≈144 DPI) is tuned for screens and email, and JPG compression adds slight artifacts around sharp edges like text.

1. Select High (≈216 DPI — print-grade) instead of Standard.
2. For pages that are mostly text or line art, select PNG — it's lossless, so edges stay sharp.
3. Click Re-convert. The file is already loaded; you don't need to drop it again.

One built-in limit to know about: a rendered page is capped at 3000 pixels on its longest edge, so an unusually large page (a poster or an architectural drawing) is scaled down to fit. That cap protects your browser's memory and can't be raised.

The background is white instead of transparent

Cause: By design, not a bug. A PDF page is treated as white paper, so every page is drawn onto a white background before export — JPG can't store transparency at all, and a transparent snapshot of a normal page would look broken on dark backgrounds. PNG output gets the same white background.

If you need a transparent image, this tool can't produce one; it exports a snapshot of the whole page.

Conversion is slow, or the tab feels stuck

Cause: Rendering happens on your device, not on a server, so speed depends on your hardware, the page count, and the resolution you picked.

1. Watch the progress line — "Rendering page 57 of 180…" means it's working, just busy.
2. Keep the tab in the foreground; browsers throttle background tabs.
3. Use Standard instead of High if you don't need print quality.
4. Close other memory-hungry tabs, or split a very large file with Pages first.

There's no "Download all (ZIP)" button

Cause: The ZIP button only appears when the PDF produced more than one image.

1. For a single-page PDF, click Save under the one thumbnail instead — it's the same file you'd find inside a ZIP.

"Couldn't convert this PDF — it may be corrupted or in an unsupported format"

Cause: The file couldn't be parsed as a usable PDF. It may be damaged, truncated by a bad download or email transfer, or not really a PDF (a renamed image or Word file).

1. Check that the file opens in another PDF viewer. If it doesn't open anywhere, re-download or re-export it from the source.
2. If it's actually an image, you don't need this tool — and if you want it inside a PDF, JPG to PDF does the reverse.
3. If the file opens fine elsewhere but still fails here, report it — that's a case the team wants to see.

Still stuck?

If none of these match what you're seeing, contact support and describe what happened. Since your file never leaves your browser, support can't see it — include the file's size, its page count, and which format and resolution you picked.