How to convert a PDF drawing or iPhone HEIC photo to JPG for upload, at the right resolution

An upload form wants a JPG, and what you have is a 24 × 36 inch PDF sheet set, a folder of iPhone photos that end in .heic, and a print-ready TIFF from the photographer. Each one fails in its own way: the PDF exports at screen resolution and the linework turns to mush, the HEIC is refused, the TIFF is too large or its colors come out wrong. This guide gives the exact export steps in Preview, Bluebeam Revu and Acrobat, the resolution to choose for each sheet size, how to get JPG from an iPhone, and how to fix TIFF and CMYK files before they cause trouble.

Key takeaways

• A JPG holds one page, so export each drawing sheet you need as its own image, and choose the resolution in pixels per inch before you export, not after.
• Pixels equal inches times pixels per inch: a 36-inch-wide sheet at 100 ppi is 3,600 pixels wide, already more than an Instagram post or a vertical video frame needs.
• In Bluebeam Revu, set the export colorspace to True Color in Import/Export preferences; Auto Detect, the default, can choose 1-bit monochrome for line drawings.
• On an iPhone, Settings > Camera > Formats > Most Compatible shoots JPG instead of HEIC, and Preview or Photos on a Mac converts existing HEIC files with File > Export.
• Print files are the usual cause of rejected uploads: convert CMYK images to sRGB and flatten 16-bit, layered TIFFs into an 8-bit JPG under the site's size limit.

How do you convert a PDF drawing to JPG for upload?

Open the PDF in a viewer that can export images, choose the single sheet you need, export it as JPEG at a resolution that gives a long side of about 2,000–4,000 pixels (for a 24 × 36 inch sheet, 100 ppi gives 3,600 pixels), and set high JPEG quality. On a Mac, Preview does this with File > Export; in Bluebeam Revu, use File > Export and choose JPEG; in Acrobat, use the Export a PDF tool's image option. Check the result at 100% zoom before you upload it.

The rest of this guide is the detail behind each part of that answer: which resolution to choose, where the settings live in each app, and what to do with photos and print files that aren't PDFs at all.

Choose the resolution before you export

A PDF drawing has no pixel size of its own; the vector linework is drawn fresh at whatever resolution you ask for. Pick it from the sheet size and the pixel size you need:

pixels = sheet inches × ppi

For social posts, web pages and AI video, a long side of 2,000–4,000 pixels is plenty; rendering export settings for Instagram lists the exact frame sizes. Higher numbers make the file bigger without making it look better on a phone, and a 300 ppi ARCH D sheet is a 78-megapixel image most upload forms will refuse. Go higher only for print or when you plan to crop a small part of the sheet, such as one plan out of a sheet of four.

Crop to what you want to show. A full sheet with a title block, notes and a key plan is unreadable at phone size; a cropped floor plan or elevation is not. If the image is going into a video, remember that video models don't read dimensions or room labels; what AI does with a floor plan explains why.

Export a PDF sheet to JPG in Preview on a Mac

Apple's steps are short: "Open the file you want to convert, then choose File > Export. Click the Format pop-up menu, then choose HEIC, JPEG, JPEG-2000, OpenEXR, PDF, PNG, or TIFF," and for JPEG "you can adjust the image's quality" (Apple Preview User Guide, as of October 2026).

1. Open the PDF in Preview and go to the sheet you want in the sidebar.
2. If you want only part of the sheet, drag a selection around it and use Tools > Crop, or crop the JPG afterward.
3. Choose File > Export, then Format: JPEG.
4. Drag Quality toward Best.
5. When the source is a PDF, recent versions of Preview also show a Resolution field in pixels per inch; enter the value from the table above.
6. Save, then open the JPG and check line weights and small text at 100%.

Apple's page also notes that holding the Option key while clicking the Format menu shows "specialized or older formats," and that you can convert several image files at once by selecting them in one window's sidebar.

Export a PDF to JPG in Bluebeam Revu

Bluebeam's manual: "Go to File > Export and select the image file type you wish to export as," with TIFF, JPEG, PNG, GIF and BMP supported; "each page is converted into an image file," numbered automatically as "MyFile Page 001," "MyFile Page 002" and so on (Bluebeam Revu 21 manual, as of October 2026).

The settings that decide quality live in Revu > Preferences > Import/Export, not in the export dialog. That page sets the resolution of exported images "in pixels/inch" and the colorspace, with options "True Color (24-bit), Grayscale (8-bit), Monochrome (1-bit), and Auto Detect," and Auto Detect is the default (Bluebeam Import/Export Preferences).

1. Open Revu > Preferences > Import/Export and set the image resolution from the table above.
2. Set the colorspace to True Color. Auto Detect may decide a black-and-white plan is monochrome, and 1-bit output has jagged diagonals and no anti-aliasing, which looks rough on a screen.
3. Close preferences, open the PDF, choose File > Export > JPEG.
4. Because every page becomes a file, export a one-sheet PDF (or delete the numbered images you don't need) rather than a 60-page set.

Export a PDF to JPG in Adobe Acrobat

In Acrobat, image export sits in the Export a PDF tool: choose Image, then JPEG, and open the settings to set resolution and color before exporting. Adobe's help pages could not be loaded for this guide as of October 2026, so the exact names may differ in your Acrobat version. The same rules apply: one sheet per image, a resolution from the table, the highest JPEG quality, and RGB rather than CMYK color.

If your drawing comes straight out of CAD, exporting the image from the CAD app or plotting a fresh PDF at the right size is often cleaner than converting a PDF someone else printed.

Get JPG instead of HEIC from an iPhone

iPhones save photos as HEIC by default to save space. You have three options.

Shoot JPG from now on. Apple: "Open Settings, then tap Camera. Tap Formats, then tap Most Compatible" (Apple Support, as of October 2026). New photos are then JPEGs; existing photos don't change.

Let the transfer convert them. When you import over USB to a Mac or PC, Apple says "the media might be converted to JPEG or H.264"; the setting is in Settings > Apps > Photos under Transfer to Mac or PC, where Keep Originals prevents conversion. Sharing by AirDrop, Messages or email may also send "a more compatible format, such as JPEG" when the receiving device can't read HEIF.

Convert existing files on a Mac. In Photos or Preview, "choose File > Export, then choose a format such as JPEG or PNG" (same Apple page). In Preview you can select many HEIC files in the sidebar and export them together. On Windows, HEIC support typically comes from Microsoft's HEIF Image Extension in the Microsoft Store; once it opens, use the Photos app or any editor to save a JPG copy.

Check first whether you need to convert at all. Arch2Video accepts HEIC directly, along with JPG, PNG, TIFF and WebP, so iPhone photos of a finished project can go in as they are; converting matters for forms and tools that refuse HEIC. For shooting the photos themselves, see phone photography for architecture.

Fix TIFF, CMYK and file-size problems

Files made for print fail upload forms more often than anything else. The fixes:

Upload limits differ by site, so read the form's limit before resizing. Arch2Video's limit is 30 MB per image with a long side of at least 512 pixels, and 1,500 pixels or more gives the sharpest scenes; a well-exported JPG of a 3,000-pixel image is far under that. If an image is too small rather than too large, upscaling a low resolution rendering covers when an upscale is safe.

A checklist before you upload

• One sheet or one photo per file, cropped to what matters.
• Long side between 2,000 and 4,000 pixels for screen use.
• JPG at high quality, or PNG for linework with flat color.
• sRGB color, 8 bits per channel, no layers or transparency.
• Small text and thin lines checked at 100% zoom.
• File names that say what each image is, such as "level-1-plan.jpg" rather than "Page 003.jpg."

Frequently asked questions

What DPI should I use to convert a PDF to JPG?

Choose the ppi from the sheet size and the pixel size you need rather than a fixed number. For screens, aim for a long side of 2,000–4,000 pixels: about 100 ppi for a 24 × 36 inch sheet, 200 ppi for an 11 × 17 inch sheet, and 300 ppi for a letter page. Print needs more; a phone screen doesn't.

Why does my exported drawing look jagged or pixelated?

Usually one of three things: the export resolution was too low, the export used 1-bit monochrome (common with Bluebeam's Auto Detect colorspace on black-and-white plans), or the JPG quality was set low, which blurs thin lines. Export again in True Color at a higher ppi and the highest quality, or use PNG, which keeps linework crisp.

Should I upload PNG or JPG?

For photos and renderings, JPG at high quality gives a much smaller file with no visible loss. For drawings with thin lines and flat color, PNG keeps edges sharp and often stays small. Most upload forms accept both; Arch2Video accepts JPG, PNG, HEIC, TIFF and WebP.

How do I change my iPhone so it takes JPG photos?

Open Settings, tap Camera, tap Formats and choose Most Compatible. New photos are saved as JPEG. Photos you already took stay HEIC, so convert those with File > Export in Photos or Preview on a Mac, or let the phone convert them on transfer by leaving the Photos transfer setting on Automatic rather than Keep Originals.