Question 1

SVG or PNG, which should I use?

Accepted Answer

**SVG** for almost everything: dev mockups, design comps, anywhere the placeholder will eventually be replaced. SVG is tiny (often <1KB), scales infinitely, and is easily inspectable. **PNG** when the consuming tool doesn't accept SVG (some legacy CMSes, some social platforms in certain contexts, image-only pipelines). PNGs are bigger but universally compatible. For the OG image meta tag specifically, social platforms (Twitter, Facebook, LinkedIn) accept PNG/JPEG but not SVG, use PNG when generating real OG images, SVG for design mockups.

Question 2

What are the common preset sizes for?

Accepted Answer

**1200×630**, Open Graph image (Facebook, LinkedIn, generic social). **1200×600**, Twitter summary card with large image. **1080×1080**, Instagram square post. **1080×1920**, Instagram/TikTok story. **400×400**, typical avatar size. **1920×1080**, full HD banner / hero image. **600×400**, standard card thumbnail. **300×250**, IAB medium rectangle ad. Each platform has a recommended size; using their preset avoids cropping surprises.

Question 3

Can I use these placeholders in production?

Accepted Answer

Yes, with caveats. For **dev environments**: absolutely, placeholders are how you fill UI before assets exist. For **staging/preview**: fine if it's clearly internal. For **production fallbacks**: a tasteful gray placeholder with the alt-text label is better than a broken image icon when an asset is missing or loading. For **public-facing default content**: probably not, generic placeholders signal incomplete work. Replace with real assets or branded fallbacks (your logo on a brand-color background) before public launch.

Question 4

Why generate locally vs using via.placeholder.com or picsum.photos?

Accepted Answer

**Via.placeholder.com** / **placehold.co** / **picsum.photos** are services that return placeholder images via URL. Convenient, `<img src='https://placehold.co/600x400'>` works without setup. Downsides: external dependency in your code (could go down, deprecate, or change behavior), every page load makes an external request (slower, privacy-relevant), and the URL is in your source code (which can be a code-review smell). Local generation gives you self-contained SVG/PNG files in your repo. Use external services for quick prototypes; bundle local placeholders for committed code.

Question 5

What's a good color palette for placeholders?

Accepted Answer

**Neutral grays** are conventional: `#cccccc` background, `#555555` text. Reads as 'this is a placeholder, not real content.' For dev environments where you want to distinguish placeholders by content type: **soft blue (#e3f2fd)** for hero images, **soft green (#e8f5e9)** for thumbnails, **soft pink (#fce4ec)** for avatars. The point is: pick something obviously distinct from your final brand colors, so placeholders are visually identifiable as placeholders during development. Don't use real brand colors, placeholders that look like real content are easy to ship by accident.

Question 6

Is anything sent anywhere?

Accepted Answer

No. SVG generation is pure string templating; PNG export uses a hidden canvas in your browser. Settings (size, colors, text) and outputs all stay in JavaScript memory. Open DevTools Network during use: zero outbound requests. Useful when generating placeholders for confidential mockups (unreleased product names in the text, internal screen layouts) that shouldn't be uploaded to external services.

Question 7

What standards does Placeholder Image Generator validate against?

Accepted Answer

Placeholder Image Generator checks compliance with PNG specification, SVG 2 specification.

Question 8

What are the limitations of Placeholder Image Generator?

Accepted Answer

Resolution limited by browser canvas size Does not support animated placeholders Text overlay uses system fonts only

Context	Resolution	Aspect Ratio	Format Choice
Open Graph	1200 × 630	1.91:1	PNG (Required)
Twitter Card	1200 × 600	2:1	PNG / JPG
HD Hero Banner	1920 × 1080	16:9	SVG (Lightweight)
Mobile Story	1080 × 1920	9:16	PNG

Placeholder Image Generator

What is Placeholder Image Generator?

Frequently Asked Questions

Technical Deep Dive

Placeholder Image Generator

Instant Generation

Fine-Grained Control

Verified Output

01 Resolution Blueprint Matrix

02 Mockup Stabilization Pipeline

Runs 100% in your browser

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