Upscale Images Online with AI
Increase image resolution in seconds while keeping detail sharp.
Drag & drop your images
or click below to browse your files
Free users: up to 15 images at once • Premium: unlimited batch processing
Images are processed locally in your browser whenever possible. If local processing isn't supported or fails, we automatically complete the job on our servers - no action required. Works with JPG, PNG, WebP, AVIF, HEIC, and TIFF. Batch processing is supported with no sign-up.
Why Use FastImageTools for Upscaling
Local-first processing
Your images are processed in-browser whenever possible for fast results and better privacy.
Fast output
Upload, choose your target quality, and export enhanced images in a simple workflow.
Completely free
No credits, no hidden paywall, and no watermark on final files.
Detail-focused enhancement
Built-in enhancement improves clarity for portraits, products, and print-ready assets.
How to Upscale an Image
- 1
Upload images
Upload JPG, PNG, WebP, AVIF, HEIC, or TIFF images from your device.
- 2
Choose settings
Select target resolution and upscale intent based on web, print, or product needs.
- 3
Download results
Download each upscaled file or export the full batch as a ZIP archive.
Browser-Based Upscaling vs Cloud Tools
FastImageTools (local-first)
- Processing runs in your browser whenever possible.
- No mandatory upload wait for most files before enhancement starts.
- Supports practical batch workflows with clear controls.
- Core upscale features are free to use.
- Can still work in limited network conditions when local execution is available.
Typical cloud tools
- —Usually requires uploading images to remote servers first.
- —Total processing time depends on upload speed and server queue.
- —Often enforces stricter file count or daily limits.
- —High-quality upscaling is frequently paywalled.
- —Usually unavailable without stable internet access.
Example Upscale Result
Original image
2.4 MB
portrait-sample.jpg
Upscaled image
6.1 MB
Sharper edges, cleaner fine detail
Supported Formats
JPG
Popular format for photos and general image sharing.
PNG
Lossless format for graphics, UI assets, and screenshots.
WebP
Modern format with strong quality-to-size efficiency.
AVIF
Next-gen format with excellent compression and quality.
HEIC
Common mobile photo format, especially on Apple devices.
TIFF
High-fidelity format for archival and print workflows.
FAQ About Image Upscaling
Will upscaling reduce image quality?+−
Is it safe to use for private images?+−
What is the maximum file size?+−
Can I upscale multiple images at once?+−
Should I export in lossy or lossless format?+−
Which format is best for web delivery?+−
What is the difference between local and cloud processing?+−
Are images uploaded to your servers?+−
Related Tools
Continue your workflow after upscaling with these tools:
Compress Image
Reduce file size after upscaling.
Resize Image
Fit exact dimensions for platform requirements.
Convert to WebP
Get smaller files with modern web compatibility.
Convert to AVIF
Maximize compression while keeping quality.
Remove Background
Create clean cutouts from enhanced images.
Photo Editor
Apply final visual adjustments before publishing.