Convert Images to PDF

A single queue can mix photos, screenshots, diagrams, and logos stored as JPG, PNG, or static WebP. Each valid source becomes exactly one PDF page in the visible order, including files that share the same name.

Move up and Move down controls provide keyboard-friendly ordering at every screen size, while a drag handle offers a faster option on larger screens. Invalid files remain visible and must be removed instead of being silently omitted.

JPG and JPEG byte streams are embedded without an additional lossy encoding pass, including explicit placement for EXIF orientations 1 through 8. PNG files use pdf-lib’s direct lossless embedding path, so alpha information is retained.

Because PDF embedding does not accept WebP directly, static WebP files are decoded locally. WebP with declared transparency uses an in-memory PNG intermediate; clearly opaque WebP uses one high-quality JPEG intermediate. No temporary file is written to disk.

Every PDF page has a white background. Transparent and semi-transparent PNG or WebP pixels remain transparent in the embedded image and therefore blend over white instead of turning black.

A4 and US Letter provide standard paper sizes. Fit image follows each image’s proportions within a bounded maximum page edge. Every mode uses contain-style placement, so images stay centered and are not cropped or stretched.

Queues support up to 20 files, 25 MiB per file, and 100 MiB in total. JPG files may contain up to 40 megapixels; PNG and WebP use a lower 25 megapixel limit because those formats can require large decoded pixel buffers while a PDF is being assembled.

WebP decoding and intermediate encoding happen sequentially inside the dedicated worker, and full-resolution decoded bitmaps are released immediately. Generated PDF output is capped at 150 MiB, and Cancel stops the worker while keeping the selected queue available to retry.