FROM PLACEHOLDER TO USEFUL TEST
Practical placeholder guides
Start with a task, choose a fixture, and know what the result does and does not prove.
Test a PDF upload from selection to preview
A practical checklist for file-size limits, multi-page viewers, retry behavior and repeatable PDF fixtures.
Use fictional maps in UI prototypes
Build a location card or contact-page mockup without implying a real address. Choose dimensions, reuse a seed and replace the fixture before release.
Choose placeholder images for responsive layouts
Choose SVG, PNG, JPEG or WebP, reserve layout space, and test wide, square and tall images before final artwork arrives.
Use silent WAV files and test tones in a media workflow
Choose duration, sample rate and channels, calculate the file size, and test playback without uploading a recording.
Add an SVG pattern or gradient to a prototype
Choose CSS or a downloaded SVG, check the background at different sizes, and share reproducible settings.
Choose a tool by what you need to test
- Exact-size files — upload limits, byte counts and basic parsing.
- PDF — page navigation and a small reusable document URL.
- Fictional maps — location-card layout before a live map is connected.
- SVG backgrounds — patterns and gradients without a generated-image API request.
For URL parameters and examples for all existing endpoints, use the API reference.