Will changing DPI alter the scale of a scanned drawing when printed?

Changing DPI metadata changes the print size interpretation, not the pixel data. If you want the drawing to print at a specific scale, calculate the required pixel dimensions first, then set the DPI to match. Deliteful does not move or scale pixels.

Our plan review portal rejects images below 300 DPI. Will this tool fix the rejection?

If the rejection is triggered by DPI metadata rather than actual pixel density, correcting the tag with Deliteful will resolve it. Confirm with the portal documentation whether it validates metadata DPI or calculates effective resolution from pixel dimensions and physical size.

Does the tool support the TIFF format used by many scanners?

Currently Deliteful supports PNG, JPEG, and WebP for DPI adjustment. TIFF is not currently supported — convert to JPEG or PNG first if needed.

Set Image DPI for Architectural Drawing Packages and Engineering Submissions

Scanned drawings, site photographs, and rendered elevations submitted in permit packages or client deliverables frequently carry incorrect DPI metadata from scanner defaults or screen-export workflows. Deliteful corrects DPI tags on image files for architecture and engineering submissions without altering a pixel of the underlying scan or render.

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Architectural and engineering document packages routinely combine vector PDFs with raster images — site photos, scanned redlines, rendered perspectives, and equipment cut sheets. When those raster images carry mismatched DPI metadata, they cause print scaling issues in assembled PDF sets and trigger preflight failures in plan review submission portals that validate image resolution. The problem appears most often with scanner-exported TIFFs and JPEGs defaulting to 200 or 96 DPI rather than the 300 DPI standard expected by print-ready document sets.

Deliteful supports PNG, JPEG, and WebP formats with DPI settings from 72 to 2400. For large-format architectural printing, where 150 DPI at final sheet size is standard, this range fully covers the workflow. Because it is a metadata-only operation, the spatial accuracy of scanned drawings — critical for scaled print output — is entirely preserved.

How it works

1
Identify images with mismatched DPI
Check your scanned drawings, site photos, or exported renders that will be included in the submission package.
2
Upload to Deliteful
Add the JPEG, PNG, or WebP image files to the DPI adjustment tool.
3
Enter the required DPI for the submission
Use 300 DPI for standard print sets, 150 DPI for large-format architectural sheets, or the value specified in the submission requirements.
4
Download and assemble the package
Replace the original images with the corrected files in your PDF assembly or submission folder.

Frequently asked questions

Will changing DPI alter the scale of a scanned drawing when printed?: Changing DPI metadata changes the print size interpretation, not the pixel data. If you want the drawing to print at a specific scale, calculate the required pixel dimensions first, then set the DPI to match. Deliteful does not move or scale pixels.
Our plan review portal rejects images below 300 DPI. Will this tool fix the rejection?: If the rejection is triggered by DPI metadata rather than actual pixel density, correcting the tag with Deliteful will resolve it. Confirm with the portal documentation whether it validates metadata DPI or calculates effective resolution from pixel dimensions and physical size.
Does the tool support the TIFF format used by many scanners?: Currently Deliteful supports PNG, JPEG, and WebP for DPI adjustment. TIFF is not currently supported — convert to JPEG or PNG first if needed.