Compress PNG/JPG
Optimize image assets to reduce payload weight and load time.
Generate placeholders for mockups, layouts, and prototypes.
Configure widths, backgrounds, and custom text tags to build prototypes.
Produce layouts placeholders. Create custom dimensions graphics with label text overlays for mockup prototypes.
Step-by-step interactive mockup tutorial
Most online dummy image generator utilities require uploading your files to remote servers, exposing sensitive business or personal data to leakage, and throttle speeds with download queues. Toolchi is different. Our validators don't just dump raw code parameters. We parse robots.txt and sitemaps to warn you about missing crawl paths, display SSL countdown renewals, visualize redirect chains, and calculate an overall Crawl Health Score to secure your ranking metrics.
Toolchi offers high-performance Developer APIs for this tool's pipeline. Integrate image compression, PDF merge/split, SEO audits, and AI generation programmatically.
It supports PNG, JPEG, and WebP outputs natively.
Toolchi operations are executed fully in your local browser sandbox. Zero files, strings, or image buffers are uploaded to servers, ensuring complete security.
Other local developer and webmaster tools you might find useful.
Optimize image assets to reduce payload weight and load time.
Verify compression support to improve delivery efficiency.
Track redirect paths for SEO, canonicalization, and QA checks.
Run a quick availability check for public site access.