JPG to PDF

No, apart from one unavoidable case. JPG to PDF embeds the original JPG bytes directly into the PDF using a direct-embed JPEG path — no decode, no re-encode, no quality loss. The single exception is a photo whose EXIF tag says it is rotated or mirrored: those pixels have to be redrawn upright, so they are re-encoded at 92% quality, which is the only way the PDF can show them the right way up. The image inside the PDF has the same resolution, color, and compression as the source file. The downside is that PDF size equals roughly the sum of source JPG sizes, so 20 photos of 3 MB each produces a 60 MB PDF. If you need a smaller PDF, compress the source JPGs first (in your phone's gallery or a tool like Squoosh), then run JPG to PDF. Alternatively, run Compress PDF on the result to recompress the embedded images at a lower quality. The default conversion prioritizes fidelity — you can always trade size for quality later, but you cannot recover detail that was thrown away during conversion.

Auto-fit sets each PDF page's dimensions to match the aspect ratio of its source image, so portrait photos produce portrait pages and landscape photos produce landscape pages. The size is computed at 72 DPI of the source pixel dimensions, which gives natural-looking page sizes around standard letter or A4 dimensions for typical phone photos. This is the right pick when you want no whitespace and no cropping — each photo fills its page edge to edge. The alternative, A4 or US Letter, gives every page the same standard size and centers the image with white margins around it. Choose Auto-fit for clean photo galleries and product sheets; choose a fixed size when the PDF needs to fit a specific printing or filing requirement.

JPG and JPEG are the same format with different extensions, so both work without distinction. To mix in PNG, WebP, or HEIC images, use the Images to PDF tool, which accepts all those formats in a single batch. To convert other formats first, use PNG to PDF, WebP to PDF, or HEIC to PDF individually, then Merge PDF to combine the results. The reason JPG has its own dedicated tool is the no-re-encode performance advantage: PNG and WebP need to be decoded and re-embedded as alternate formats inside the PDF, which is slower and slightly larger. JPG embeds natively as-is, making the dedicated tool the fastest path for the most common image type.

It should not be. JPG files often contain EXIF orientation metadata recording how the camera was held, and a raw PDF embed ignores that metadata — which is exactly how photos end up sideways in other converters. JPG to PDF reads the EXIF orientation tag before embedding: an upright photo (orientation 1, or no tag at all) is embedded byte-for-byte with no re-encoding, and a rotated or mirrored photo is turned into upright pixels first, with the page orientation picked from the corrected width and height. That means the page preview and the downloaded PDF always agree with what your phone gallery shows. Rotating a photo does require re-saving its pixels, so those images are re-encoded at high quality (92%) instead of being copied verbatim; untouched photos keep their original bytes. If a photo still looks wrong, its pixels themselves are rotated and its EXIF tag says upright — open it in any image editor, apply a Rotate action, re-export, and convert again.

No. JPG is an image format with no embedded text data, so the resulting PDF is also a pure image PDF — no text, no search, no copy-paste. If the JPGs are photos of documents (a phone-camera scan of a paper receipt, for example), run OCR PDF on the converted PDF to recognize the text and embed an invisible text layer. The result will look identical but become searchable. For best OCR accuracy, the source photos should be well-lit, in focus, and roughly straight-on (not severely angled). If text recognition is important, use the Scan to PDF tool from the start — it includes auto-cropping and perspective correction before OCR.

No fixed limit. The tool processes images in browser memory, so the practical ceiling depends on your device's RAM and the size of each image. On a typical laptop, batches of 100+ photos at 5 MB each work without trouble. On phones, 30-50 photos is a comfortable batch — beyond that the browser may slow down or crash. If you have hundreds of images, split into batches of 50, convert each to a PDF, then use Merge PDF to combine the partial results. Image dimensions also matter: a single 50-megapixel photo uses far more RAM during conversion than ten 12-megapixel photos. Compress huge images first or convert in smaller batches if you hit memory limits.