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🔒 Your image never leaves this device — AI upscaling runs entirely in your browser

AI Image Upscaler

Upscale photos 2× or 4× with Real-ESRGAN — sharper detail, zero uploads, runs on your device.

AI · Local
🔬

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Drop an image above to upscale it 2× or 4× with AI.

Drop your image here

JPEG, PNG, or WebP — upscaled locally with Real-ESRGAN

or paste from clipboard (Ctrl+V / ⌘V)

About this tool

AI Image Upscaler — Enlarge photos without losing quality

NexusCompress uses a Real-ESRGAN neural network to upscale images 2× or 4× with AI-reconstructed detail — not just stretched pixels. The entire process runs in your browser. Your photos are never uploaded to any server.

How is AI upscaling different from regular resizing?

Standard resizing (bicubic, Lanczos) simply interpolates between existing pixels, producing a larger but often blurry result. Real-ESRGAN uses a neural network trained on millions of image pairs to hallucinate realistic detail — reconstructing textures, sharpening edges, and reducing compression artifacts in the process.

What is the best use case for AI upscaling?

AI upscaling works best on photos, portraits, and natural images. It is particularly effective for rescuing old low-resolution photos, upscaling AI-generated images for print, enhancing product photos from suppliers, and improving scanned document clarity before portal uploads.

Does the upscaler work offline?

Once the AI model has been downloaded on first use (~5 MB), it is cached in your browser. All subsequent upscaling runs entirely offline — no internet connection is needed.

Full FAQ guide (structured data for search) →

Frequently Asked Questions

Full FAQ guide (structured data for search) →

How do I compress a JPEG without losing quality?

Use a quality setting between 75% and 85% for photos. If the image is only for the web, convert to WebP or AVIF — they often produce smaller files than JPEG at the same visual quality. See our JPEG compression guide for step-by-step settings. Use the before/after slider in NexusCompress to confirm details look acceptable before downloading.

Is it safe to upload my photos here?

Your photos are never uploaded. NexusCompress processes images entirely inside your browser using Web Workers and the OffscreenCanvas API. Files stay on your computer or phone; nothing is transmitted to our servers for compression. That makes it safe for sensitive screenshots, client work, and personal albums — as long as you trust your own device, your images remain local.

What is the best format to reduce image file size?

For most websites, WebP offers an excellent balance of quality and size (compare JPEG vs WebP). AVIF often achieves the smallest files where supported (AVIF vs WebP). Use JPEG for email; PNG for transparency.

Can I compress multiple images at once?

Yes. Drop multiple files or import an entire folder. NexusCompress queues each image, shows progress and savings per file, and lets you download everything as a single ZIP when you are done.

Does compressing remove EXIF or location data?

Re-encoding an image strips metadata such as GPS location, camera model, and timestamps. NexusCompress also corrects EXIF orientation so photos from phones display right-side up. This is ideal for privacy when sharing images online.

Is this tool really free?

Yes. Core compression is free with no account required. The tool runs in your browser, so there are no per-image API fees — only optional ads help support hosting.