Why convert Image to PDF?
Real-world document workflows rarely involve a single image format. A typical insurance claim might include HEIC photos from an iPhone, PNG screenshots from a computer, and TIFF scans from a flatbed scanner — all of which need to be packaged into one consolidated PDF for submission. Handling mixed image formats in a single batch is exactly what File Converter Pro''s image-to-PDF merge mode is built for.
Converting images to PDF is useful across every professional domain: architects submit site-photo packages as PDF appendices, HR managers convert scanned ID documents and selfie photos together, insurance adjusters bundle damage photos of different formats, and consultants package their research screenshots alongside TIFF exports from specialized tools.
The alternative — converting each format separately, then combining PDFs — is a multi-step process that introduces unnecessary friction and potential quality loss from intermediate conversions. File Converter Pro handles JPG, JPEG, PNG, HEIC, TIFF, BMP, WebP, AVIF, and more in a single conversion pass, preserving each image at the quality level you specify.
All conversion runs offline on your Windows 10 or 11 machine. Mixed batches of sensitive personal and business images never leave your local environment.
How to convert Image to PDF on Windows
- Install File Converter Pro. Get File Converter Pro from the Microsoft Store. The free trial includes multi-format image to PDF conversion.
- Add mixed image files to the queue. Drag images of any supported format into the app — JPG, PNG, HEIC, TIFF, BMP, WebP, AVIF. Mix and match freely. The app handles each format automatically.
- Set merge mode and page layout. Choose "Merge all to one PDF" for one combined document. Set page size (A4, Letter, or fit-to-image) and the JPEG quality for image embedding.
- Convert offline. Click Convert. Each image is decoded from its source format and embedded in the PDF in the queue order you set. Output is local — no upload.
Batch conversion for big folders
Mixed-format image batches are the norm in professional document workflows. File Converter Pro processes all supported formats in one job without manual preprocessing.
- JPG, PNG, HEIC, TIFF, BMP, WebP, AVIF all accepted in the same queue.
- No per-image or per-page limits — batches of hundreds of images work fine.
- Drag to reorder the queue to control page sequence in the merged PDF.
- Works offline — suitable for legal, medical, and government document workflows.
Quality settings that actually matter
Images are embedded in the PDF at a quality you set:
- Lossless embedding for PNG/TIFF/BMP: pixel-perfect, larger PDF. Best for technical screenshots and diagrams.
- JPEG embedding quality 90: near-lossless for photos, significantly smaller PDF.
- JPEG embedding quality 80 (default for mixed batches): good balance for multi-format PDFs containing a mix of photos and diagrams.
- DPI setting: 150 DPI for screen PDFs, 300 DPI for print or archival use.
Common issues and fixes
- HEIC files not converting. Ensure the app is up to date. If HEIC decoding fails, pre-convert HEIC to JPG first using the HEIC to JPG conversion mode, then add the JPGs to the image-to-PDF batch.
- Mixed page orientations in PDF. Landscape-oriented photos become landscape pages; portrait images become portrait pages in fit-to-image mode. Use fixed A4/Letter to normalise all pages to the same orientation.
- Very large PDF output. Choose JPEG quality 75-80 for a balanced size-quality trade-off in mixed-format batches.
- Page order not matching file names. Alphabetical sort is the default. Drag files in the queue to set the exact page sequence you need.
Related conversions
FAQ
Which image formats can I convert to PDF?
File Converter Pro supports JPG, JPEG, PNG, HEIC, TIFF, BMP, WebP, AVIF, and more. Mix any of these formats in the same batch queue and they all convert to PDF in one run.
Can I merge images of different formats into one PDF?
Yes. Add JPGs, PNGs, HEICs, and TIFFs to the same queue, arrange the order, and choose "Merge all to one PDF." The app handles each format automatically.
Is there a page limit for the merged PDF?
No. File Converter Pro does not impose per-page limits. Large batches of hundreds of images merge into one PDF without issue.
Does image-to-PDF conversion work offline?
Yes. Everything runs locally on your Windows 10 or 11 PC. No images are uploaded to any server.
Ready to convert your Image files?
Download File Converter Pro from the Microsoft Store and merge any combination of image formats into a professional PDF offline — no upload, no watermark, no page limits, free trial.