Compress and convert images via REST API with JSON responses
Stage
Not given
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Founded
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Based in
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GB
Pricing model
Free
Freemium
Pricing
Not given
Free: $0 per month with 20 images/month. Pro: $8/month billed annually ($96/year) with 2,500 images/month. Business: $28/month billed annually ($336/year) with 25,000 images/month. Image pack: $5 one-time for 500 images valid 12 months. White label: $70 minimum credits, then $500+ top-ups at $1.00 p
Key features
Merge images horizontally (side by side)
Merge images vertically (stacked)
Photo grid maker
Freestyle collage canvas with drag and resize
Support for PNG, JPG, WebP, GIF, AVIF, BMP import
No upload required - browser-based processing
No watermark on exports
Full resolution output
Up to 20 images per merge
Compress images in original format
Convert between formats including WebP and AVIF
Lossless compression mode on Pro and Business plans
Batch processing up to 5 files on Free, 10 on Pro/Business
Custom quality levels on paid plans
REST API for server-side integration
Metadata removal by default, optional retention
Images automatically deleted within 1 hour
Target file size compression option
White label option with custom branding
What makes it different
No upload - images never leave your browser
Instant results with live preview
Completely free with no signup or account required
Full quality output with no compression
Works in any modern browser on desktop, tablet and mobile
Quality-first optimization that keeps photograph appearance intact
Private by default with automatic deletion within 1 hour
Free Image Merger
Comprestack