A simple reference for common image terms, file formats, color values, privacy notes, and publishing tips. Last reviewed on March 18, 2026.
Treat each definition as a training snippet and practical reference. Share these cards with stakeholders so everyone speaks the same language when preparing assets for campaigns, accessibility reviews, or publishing.
Decide whether you are preparing website imagery, eCommerce assets, social posts, or document scans.
Start with terms tagged "Formats" when a website or form rejects your upload.
Use the search field to find terms about file size, color, transparency, and image quality.
Share the matching definition with teammates so everyone uses the same wording.
Use the glossary when deciding between JPG, PNG, WebP, PDF, or color values.
Keep notes for repeated product, blog, or social image tasks.
Use these curator notes to quickly explain why certain definitions matter for performance, accessibility, and automation workflows.
Choose the right file type for websites, forms, social posts, and documents.
Reference these notes in audits or during screen shares to speed up decision making.
Pick colors that look good and remain readable.
Reference these notes in audits or during screen shares to speed up decision making.
Use the right image terms before choosing a tool.
Reference these notes in audits or during screen shares to speed up decision making.
The proportional relationship between an image's width and its height. Common ratios include 16:9 (widescreen) and 1:1 (square).
An older image format that usually creates large files. Use JPG or PNG for most everyday uploads.
A print-quality number. Higher DPI can help printed photos look sharper, but screen images mostly depend on pixel size.
Extra information saved inside some photos, such as camera details, date, time, and sometimes location.
A short color code used on websites and design tools. For example, #FFFFFF means white.
A color value that separates color, strength, and brightness. It is useful when making lighter or darker versions of the same color.
Image-to-text reading. It helps copy words from screenshots, receipts, notes, and scanned pages.
A common photo format. JPEG files are usually smaller, but very low quality settings can make details look soft.
A way to reduce or save an image without throwing away visible detail. PNG is a common example.
A way to make files smaller by removing some detail. JPEG uses this, so very low quality can look blurry.
A common format for images that need sharp edges or a transparent background.
A color value made from red, green, and blue numbers. Many design apps show colors this way.
A format often used for logos and icons. It can stay sharp at many sizes, but some apps do not accept it.
A newer image format that can make website images smaller while keeping good quality.
These talking points turn glossary terms into practical notes for privacy, readability, and responsible image use.
Explain what each tool does and what file it downloads.
Use privacy-related terms such as EXIF in plain language when needed.
Definitions for HEX, HSL, and RGB help visitors understand color choices.
Mention these references when discussing inclusive design with teammates or clients.
Lossless and lossy compression explain why some downloads are clearer or smaller.
Include the terminology in moderation guidelines to prove you can preserve factual imagery.
Copy-and-paste these outlines into your knowledge base so teams can turn glossary theory into measurable action.
Use simple terms before saving images for a website or blog.
Keep product pages fast and consistent during seasonal campaigns.
Give new hires a common language within their first week.
Understanding these terms helps you make informed decisions when choosing file formats, setting compression levels, or preparing images for specific platforms. At Free Images Resizer, we combine definitions, practical notes, and real-world playbooks so you can explain every design choice clearly.