Image Placeholder Font Customization & Live Preview
Make your placeholder images stand out with custom fonts, sizes, and styles. Imageslot lets you choose from multiple supported fonts, adjust bold/italic, set the perfect size, and ensure legibility in every image. Try our interactive Font Preview Tool below to see real-time font changes, and learn how to style your API calls for accessible, branded placeholder text.
Try the Font Preview Tool
Supported Fonts for Image Placeholders
Choose from a range of modern, legible fonts for your placeholder images. Each font is optimized for web use, ensuring your design mockups and prototypes match your brand’s style and accessibility needs.
Font Previews
- Manrope Default
- Roboto
- Nunito
- Quicksand
- Fira Sans
- IBM Plex Sans
- Lato
AaBbCc123
Manrope
AaBbCc123
Roboto
AaBbCc123
Nunito Italic
AaBbCc123
Quicksand
AaBbCc123
Fira Sans
AaBbCc123
IBM Plex Sans
AaBbCc123
Lato Italic
Tip:
You can specify any of these fonts in your API call with the
font= parameter. For full font options and codes, see API Reference.
Why customize fonts? Unique fonts boost brand consistency, legibility, and visual appeal in your placeholder images. Choose a font that matches your site or app for the most realistic mockup experience.
How to Change Font and Size in the Imageslot API
Easily set the font, size, weight, and style for your placeholder images using Imageslot’s flexible API parameters. Below are code examples and sample URLs for quick integration.
API Parameter Examples
font=— Set the font family (e.g.,font=Roboto).fontsize=— Set font size in px (e.g.,fontsize=42).bold=1oritalic=1— Toggle bold or italic style.
/v1/600x200?font=Roboto&fontsize=42&bold=1&text=Bold+Roboto&filetype=png
/v1/400x100?font=Quicksand&fontsize=28&italic=1&text=Italic+Quicksand&filetype=png
/v1/500x180?font=Nunito&fontsize=36&text=Custom+Font+Example&filetype=png
Code Integration Examples
HTML:
<img src="https://imageslot.com/v1/400x120?font=Manrope&fontsize=34&bold=1&text=Custom+Font&filetype=png" alt="Placeholder">
cURL:
curl "https://imageslot.com/v1/600x200?font=Roboto&fontsize=32&text=API+Font+Test&filetype=png" --output font-test.png
JS Fetch:
fetch('https://imageslot.com/v1/400x100?font=Quicksand&text=Hello&filetype=png')
.then(res => res.blob())
.then(blob => /* handle image */);Try the Interactive Font Preview Tool
Live Preview:
The quick brown fox 123
API Call:
Adjust the options to instantly see your text styled and get the API call you need.
Advanced Font Options & Best Practices
Advanced Font Parameters
- Line Height: Use
lineheight=to increase or decrease vertical spacing (e.g.,lineheight=1.4). - Letter Spacing: Use
letterspacing=to set horizontal space between letters (e.g.,letterspacing=2). - Fallback Strategy: If a requested font isn’t available, Imageslot will default to a modern, readable web-safe font (usually Manrope or Roboto).
- Font Licensing: Only open-source, web-safe fonts are supported to ensure legal and fast rendering.
Best Practices for Font Selection
- Choose high-contrast color combos for readability (e.g., dark text on a light background).
- For accessibility, use larger font sizes and avoid overly decorative fonts for body text.
- Keep placeholder fonts similar to your brand fonts for seamless design handoff.
- Test your placeholder images on different screens and at various sizes for clarity.
- Combine bold and italic sparingly for best legibility.
FAQ: Font Support, Styling, and Troubleshooting
Clean, sans-serif fonts like Manrope, Roboto, and Fira Sans offer excellent legibility and accessibility at a wide range of sizes. For body text or long labels, avoid decorative or script fonts. Use high-contrast color combinations and larger sizes for maximum readability. For more, see our accessibility tips.
At this time, only a curated set of open-source, web-safe fonts are supported to ensure performance and legal compliance. If you need a specific font, contact support and we’ll consider adding it in future updates if licensing allows.
If the API receives an unsupported font name, it will automatically fall back to the default (Manrope) or another web-safe font. Check the API response or your placeholder image—if the font looks different than expected, verify that the font parameter is correct and supported.
All supported fonts are optimized for fast rendering and minimal file size. Choosing a non-default font may have a negligible impact on generation speed, but the difference is usually less than 1%. Large font sizes and added effects (bold, italic, shadow) may slightly increase image size, but have no major impact on delivery speed.
First, check if your brand font is in the supported list above. If so, specify it via the
font= parameter in the API URL. For unique brand fonts not yet supported, select the closest available option and use matching size, weight, and style for consistency. You can also suggest a font for future support.
If your font doesn’t look right: 1) ensure you spelled the font name correctly; 2) confirm it’s supported; 3) check if bold/italic/size parameters are set as desired. If issues persist, try the Font Preview Tool to test options visually, or contact support for help.