What This Tool Does
This placeholder image generator creates SVG images of any dimensions with custom background color, text color, and custom text (or automatic dimensions label). The generated image displays live in your browser and can be downloaded as SVG (vector) or PNG (raster) — perfect for mockups, wireframes, and design prototypes.
Inputs Explained
- Width & Height: Dimensions in pixels (from 50 to 4000 each).
- Background Color: Any color via color picker or hex input.
- Text Color: Color of the label text on the image.
- Custom Text: Optional. Leave blank to auto-show dimensions (e.g., '800 × 600').
- Format: SVG (scalable vector) or PNG (fixed raster).
How It Works
The tool builds an SVG element with your dimensions, a rect filled with the background color, and centered text with the label. SVG scales perfectly at any zoom. For PNG export, the SVG is drawn to a canvas element and exported using canvas.toDataURL.
Formula / Logic Used
Placeholder Image Generator
Create custom placeholder images for mockups, wireframes, and design prototypes.
Step-by-Step Example
Settings: 800×600, grey background, download as SVG
Result: An 800×600 SVG file with "800 × 600" centered in grey text.
Common sizes: 1200×630 (Open Graph / Twitter card), 1920×1080 (Full HD hero), 150×150 (profile avatar), 300×250 (medium rectangle ad), 728×90 (leaderboard).
Use Cases
- Design mockups: Quickly fill image slots in wireframes before real photos are ready.
- HTML/CSS testing: Test responsive image layouts with exact-size placeholders.
- Open Graph previews: Generate 1200×630 social media cards for sharing pages before hero images are designed.
- Email template prototypes: Fill image slots in email mockups at the exact final dimensions.
- Portfolio presentations: Create dimension-labeled placeholders that show intended image sizes.
Assumptions and Limitations
- Placeholders show dimensions/text only — no complex imagery or gradients.
- PNG export uses your browser's canvas rendering, which may differ slightly from SVG on some platforms.
- Very large PNG exports (4000×4000) may use significant memory.
- Text in SVG uses system fonts; fonts may render differently across devices.
Frequently Asked Questions
What format should I use — SVG or PNG?
SVG scales perfectly at any size and has tiny file size (2-3 KB). PNG is fixed-resolution but universally supported. Use SVG for web mockups; PNG for emails, PowerPoint, or anywhere SVG isn't supported.
Can I use these images commercially?
Yes. Generated placeholders are your own creation (just simple SVG/PNG files with a colored rectangle and text). You retain all rights and can use them commercially, though you should replace them with real images before launch.
What are common image dimensions I should know?
Open Graph / Facebook: 1200×630. Twitter card: 1200×675. Instagram feed: 1080×1080. LinkedIn: 1200×627. YouTube thumbnail: 1280×720. Avatar: 150×150 or 300×300. Hero image: 1920×1080.
Why use SVG placeholders?
SVG placeholders are resolution-independent — they look crisp on any display including Retina screens. They're also tiny (2 KB vs 50 KB for PNG), load instantly, and can be embedded directly in HTML.
Can I use these in production?
Technically yes, but you should replace them with real images. Search engines and users expect real content. Placeholder images in production signal unfinished work.
Does the generator have a size limit?
Up to 4000×4000 pixels. Above that, browser memory becomes a concern for PNG export. SVG has no practical size limit because it's vector.
How do I embed the SVG directly in HTML?
Copy the SVG code and paste it directly into your HTML. Inline SVG avoids an extra HTTP request and lets you style it with CSS. Alternatively, save as .svg file and use 
.
Is my design data saved?
No. Image generation runs entirely in your browser. Your color choices and dimensions never leave your device.
Sources and References
- MDN — SVG — Complete SVG reference and tutorials.
- W3C SVG 2 Specification — Official SVG format specification.
- MDN — Canvas toDataURL — Browser API used for PNG export.
- Open Graph Protocol — Standard for social media image dimensions.