Pixel Art Upscaler Online
Enlarge pixel art sprites and retro game textures by exact integer scales (2× to 32×) with zero blur and sharp edges. 100% private.
- 1Add your imageJPG, PNG, WebP or HEIC — it stays in this tab
- 2Set it upSay what the result should look like
- 3Press the buttonThe result appears beside the original
Add one above. It is read in this tab and never uploaded.
Choose a multiplier, then upscale. The crisp, blocky result appears here.
Settings
Each one says what it does. Change any of them and run it again.How to use it
How to Upscale Pixel Art without Blurring
Upload Sprite
Select your 16x16, 32x32, or 64x64 pixel art sprite or tileset.
Choose Multiplier
Pick an integer scale factor (such as 4x or 8x) to avoid distortion artifacts.
Select Algorithm
Use Nearest Neighbor for classic sharp pixels or Scale2x/EPX for smoothed retro edges, then download your PNG.
About this tool
Understanding Pixel Art Scaling Algorithms
When displaying retro assets on modern 4K and Retina displays, choosing the right scaling method is key:
- Nearest Neighbor: The gold standard for preserving exact pixel aesthetics. Each original pixel is cloned into an exact NxN square block with 100% crisp color accuracy.
- Scale2x / AdvMAME2x: Originally created for arcade emulators (MAME), this algorithm detects adjacent color relationships to fill corners smoothly without introducing anti-aliased blur.
- EPX: Expands pixel resolution by analyzing 4-connected neighbors, ideal for organic character sprites.
Common questions
Frequently Asked Questions
Does upscaling add blurry anti-aliasing?
Never. Standard image editors blur edges using linear interpolation. Our tool is purpose-built to preserve hard, clean pixel boundaries.
Does it support transparent backgrounds?
Yes. Alpha transparency channels are preserved perfectly across all integer scaling multipliers.
Can I upscale tilesets and sprite sheets?
Yes, since integer multipliers scale every tile evenly, your grid alignments remain 100% mathematically aligned.
Check for yourself that nothing is uploaded
🔎 Verify it yourself: nothing uploads
Open your browser DevTools (F12 → Network tab). Pixel art upscaling algorithms execute 100% locally in your browser.