# PDF contact sheet > Browser-only file conversion. Selected files are processed on this device and are not uploaded to a conversion server. Source: https://localconverter.tech/pdf-contact-sheet Create a labelled thumbnail overview of PDF pages as PNG or PDF. Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. Choose the supported original file using the file picker or drop zone. Check the accepted input types listed above the workspace. ## Useful tasks - Arrange PDF page thumbnails into a contact sheet. - Review the order of PDF pages in one visual overview. - Save labelled page thumbnails as PNG or PDF. ## Steps 1. **Provide the source**: Choose the supported original file using the file picker or drop zone. Check the accepted input types listed above the workspace. Read the operation note before starting, because supported syntax and file limits are part of the result contract. The original file is not overwritten or renamed by this workflow. 2. **Choose the intended result**: Review the controls for Download format, Columns, Thumbnail width (px). Change settings according to the file or text you actually supplied. Defaults are a starting point rather than a promise that every source uses the same conventions. Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. 3. **Create and inspect the output**: Use the main action button to run pdf contact sheet. Local processing checks the source and reports malformed or unsupported inputs. A completed job appears in Your results, with a download action and a preview when the output supports it. If the operation fails, read its message and correct the source or settings before retrying; changing only a filename does not change file contents. 4. **Save and verify the result**: Download the finished output and open it in the application or workflow that will consume it. Choose the original source, adjust the settings, create the result and inspect the saved output. Check the values, layout, encoding or parsed structure relevant to your task. Keep the source when you may need another set of settings later. Temporary job downloads are session-owned and expire; saving your own copy is the way to retain a result. ## Settings - **Download format**: Choose download format according to the result you need. Available choices: png; pdf. The initial selection is png. - **Columns**: Columns accepts values from 1 to 8, using whole numbers. The initial value is 3. Change it for a specific output requirement, then check the result before processing more files. - **Thumbnail width (px)**: Thumbnail width (px) accepts values from 100 to 500, using whole numbers. The initial value is 240. Change it for a specific output requirement, then check the result before processing more files. ## Try pdf contact sheet with a small source Choose one small supported PDF file. Use the initial settings, inspect the result and then change one setting to understand its effect. Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. ## Check the result Choose the original source, adjust the settings, create the result and inspect the saved output. Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. Open the saved output in the app or workflow where you plan to use it. Check one representative result before repeating the same settings with more files. The original files stay unchanged. ## Limits - Files are processed on this device. Browser memory and engine-specific limits apply. Save results before reloading. - Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. - Upload one file with a combined size of at most 100 MB. The completed output must fit within 200 MB. - Files are checked by the local engine; a matching filename alone is not proof of valid contents. - Selections and completed jobs stay available while you navigate inside this tab. Use My files to revisit results. Reloading or closing the tab clears the workspace; download results you want to keep first. ## Questions ### What does PDF contact sheet produce? Create a labelled thumbnail overview of PDF pages as PNG or PDF. Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. ### Which source should I use? Choose the supported original file using the file picker or drop zone. Check the accepted input types listed above the workspace. Supported file extensions are pdf. The processing engine checks actual contents; a matching extension alone does not make malformed content valid. ### Why did this input fail? Up to 100 PDF pages and 40 million sheet pixels. Page labels use original page numbers. This is a visual overview, not a replacement for readable full-size pages. Check syntax, required inputs and the ranges shown next to settings. An error keeps unsupported data from being presented as a successful conversion. Correct the source and retry rather than repeatedly resubmitting an unchanged invalid input. ### How should I check the download? Choose the original source, adjust the settings, create the result and inspect the saved output. Review the saved content in its destination application, including a typical case and any boundary values important to your use. A completed operation confirms processing finished; it cannot determine whether the supplied settings match your wider business requirements. ### Does PDF contact sheet upload files to another service? Processing runs in this browser, on your device. Files and pasted input are not uploaded to a conversion server. The website and required engine assets must load first; large operations depend on available device memory. ### Can I continue after changing pages? Selections and completed jobs stay available while you navigate inside this tab. Use My files to revisit results. Reloading or closing the tab clears the workspace; download results you want to keep first. ## Related guides - [Images to PDF](https://localconverter.tech/images-to-pdf.md) - [Join images / collage](https://localconverter.tech/image-collage.md) - [Image metadata comparison](https://localconverter.tech/compare-metadata.md) - [PDF to TXT](https://localconverter.tech/pdf-to-txt.md) - [PDF to PNG](https://localconverter.tech/pdf-to-png.md)