What Steps Are Needed For Making Accessible Pdfs With Images?

2025-09-02 19:03:37 340

4 Answers

Clarissa
Clarissa
2025-09-03 13:13:27
When I tackle an accessible PDF, my first stop is the source file. If I can edit the original in Word or InDesign, I add alt text to images there, use real headings instead of styled text, and include captions under figures. Export to tagged PDF rather than printing to PDF. After export I run an accessibility checker and inspect the tag tree to confirm each image is nested in a Figure tag with an Alt entry. Decorative graphics get empty alt text (''), not ignored, so screen readers skip them properly.

I pay special attention to images containing text—those need the text duplicated elsewhere or transcribed in the alt/longdesc. For complex visuals like charts, I include both a short alt and a longer explanatory paragraph in the body, or link to a separate description. Finally, I test with a screen reader and keyboard navigation, fix reading order issues, set the document language, and add bookmarks for quick navigation. If the PDF will be validated to 'PDF/UA' or WCAG, I use PAC 3 and manual testing to be sure.
Uma
Uma
2025-09-03 17:40:57
I like making a short, friendly checklist I can follow when adding images to PDFs, especially if I’m doing a batch of documents. First, determine purpose: decorative (mark as decorative), informative (write alt text), or complex (add a long description). Keep alt text concise—one sentence for simple photos, a couple of lines for more detailed images.

Next, ensure the PDF is tagged and that each image is inside a Figure tag with a Caption tag if there’s visible caption text. Run OCR for scanned docs so text becomes accessible. Set document language, embed fonts, and verify color contrast for any text on images. Finally, test with an accessibility checker and a screen reader like NVDA or VoiceOver, and fix reading order or tab order problems. It’s a few extra steps, but it makes PDFs usable for so many more people, and that little effort usually pays off quickly.
Kyle
Kyle
2025-09-06 23:42:32
My process often starts with a problem scenario: someone emailed me a scanned brochure full of product photos and tiny captions that weren’t readable. I opened it, ran OCR, and unlocked the text. From there I mapped out what each image conveyed—was it brand ambiance, instructions, or key data? For photos that were purely decorative, I flagged them as artifacts so they didn’t interrupt a screen reader. For instructional images I wrote short, specific alt text, and for process diagrams I created a detailed text block explaining steps and relationships.

On the technical side I check the structure tree in a PDF editor and repair any missing tags, ensuring headings, lists, and figures are semantic. I always set language metadata and embed fonts so screen readers pronounce correctly. After automated checks I take a real-user approach: I navigate by keyboard, listen with NVDA, and ask a colleague to try it on a phone with VoiceOver. Over time I’ve built templates and snippets for common alt text types—charts, screenshots, logos—that speed the work and keep it consistent. If you’re curious, try exporting a small test document and iterating; it’s the best way to learn.
Nathan
Nathan
2025-09-07 07:41:09
Honestly, making accessible PDFs with images is mostly about planning and thinking like someone who navigates by sound or keyboard rather than sight. I start by treating every image as a piece of content that needs context: is it decorative, informative, or carrying meaningful text? For decorative ones I mark them so they’re skipped by screen readers; for informative ones I write concise alt text that explains what matters. If an image has lots of information (a chart, diagram, or a screenshot with labels), I add a longer description either inline near the image or via a link to a separate text description.

Next I focus on tags and structure. I make sure the PDF is tagged, has a proper reading order, and that the figure is wrapped in a
tag with a when appropriate. If the PDF started life in Word, InDesign, or PowerPoint I export to tagged PDF and then fix any tag glitches in a PDF editor. For scanned pages I run OCR so text becomes selectable and readable by screen readers. I also set the document language, embed fonts, check contrast for any overlaid text, and ensure images that contain text have that text also present in real text form.

Finally, I test. Automated checkers like PAC 3 or Acrobat’s checker catch a lot, but I also skim with NVDA or VoiceOver myself and try keyboard-only navigation. It takes a couple of passes to get right, but once I have a checklist I reuse it and the PDFs become much friendlier for everyone.
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