Compression trades detail for size
Lossy formats like JPG and WEBP, and the image/PDF compressors, reduce file size by discarding some detail. Higher compression means smaller files but softer images; PNG stays lossless but larger.
PDF-to-image depends on resolution
Each PDF page is rendered to a raster image at a set resolution. Higher resolution looks sharper but produces larger files; very fine text or thin lines can soften at lower settings.
Vector to raster is one-way
Rasterizing an SVG to JPG or PNG works cleanly, but the result is a fixed-resolution image — it can no longer be scaled infinitely like the original vector.
OCR accuracy varies with the source
Text recognition (OCR) is highly accurate on clean, high-contrast scans. Low-resolution, skewed, handwritten, or noisy images will produce more errors — review the extracted text before relying on it.
Text extraction drops layout
Extracting text from a PDF preserves the words but not the original page layout, columns, or styling.
Recommended workflow
Always review converted output, compare to the original where critical, and retain a backup of the source file.