Pixel Art Upscaler
Enlarge pixel art and sprites by 2×, 3×, 4×, 6×, 8×, 10×, or 16× without blurring or artefacts. Choose from nearest-neighbour (perfect pixel replication), Eagle, or xBR algorithms. Runs entirely in your browser — your image never leaves your device. No signup required.
Output will be 4× larger than the input. A 32×32 sprite at 4× → 128×128 px.
Why Use Our Pixel Art Upscaler?
Three Upscale Algorithms
Choose from Nearest-Neighbour (perfect pixel replication at any scale), Eagle 2× (corner smoothing), or xBR 2× (diagonal edge detection). Every algorithm preserves the pixel art aesthetic without blurring.
Secure — Processed Entirely on Your Device
Your pixel art never leaves your device when you use this upscaler. All processing runs client-side in the Canvas API — completely private, zero uploads, zero data collection.
Integer Scales from 2× to 16×
Upscale pixel art by 2×, 3×, 4×, 6×, 8×, 10×, or 16× — all exact integer factors. Integer scaling guarantees that every source pixel maps to a perfect uniform block with no sub-pixel artefacts.
PNG, JPEG, WebP Output — No Installation
Export your upscaled pixel art as lossless PNG (recommended), JPEG, or WebP. Works in any modern browser on desktop or mobile — no software to download, 100% free forever.
Common Use Cases for Pixel Art Upscaler
Game Development & Game Jams
Upscale low-resolution pixel art sprites and tilesets for use in game engines like Unity, Godot, or GameMaker. Integer scaling ensures sprites render crisply at any display resolution.
Retro Game Asset Preservation
Upscale original 8-bit and 16-bit game sprites and tiles for modern displays without blurring or aliasing. The pixel art upscaler preserves the authentic blocky look of classic hardware graphics.
Pixel Art Editing Preparation
Upscale a small pixel art canvas before importing into Aseprite, Photoshop, or Procreate for fine-detail editing. Working at a larger scale gives more room for precision edits.
Print & Merchandise
Enlarge pixel art to print-ready dimensions for posters, stickers, t-shirts, and merchandise. A 64×64 sprite at 16× becomes 1024×1024 px — sufficient for many print applications.
App Icons & UI Assets
Upscale pixel art icons from a small master size to all required platform resolutions — iOS, Android, and web app manifests all need multiple size variants of the same icon.
Streaming Overlays & Emote Assets
Enlarge Twitch emotes, Discord emojis, and streaming overlay sprites without blurring. Pixel art upscaling with nearest-neighbour keeps the crisp retro look required for branded stream assets.
Understanding Pixel Art Upscaling
What is a Pixel Art Upscaler?
A pixel art upscaler is a tool that enlarges low-resolution pixel art and sprites by exact integer multiples — 2×, 3×, 4×, and so on — without introducing any blurring or colour interpolation. Standard image resizers use bilinear or bicubic algorithms that average neighbouring pixels to create smooth transitions, which destroys the crisp hard edges that define pixel art. A pixel art upscaler uses nearest-neighbour interpolation instead: each source pixel is replicated into an exact N×N block of identical pixels, preserving every hard edge and colour boundary exactly. This tool also offers the Eagle and xBR algorithms for 2× upscaling, which can optionally smooth diagonal lines while keeping flat pixel areas intact.
How Our Pixel Art Upscaler Works
- 1. Upload Your Pixel Art: Drop or select a PNG, JPG, WebP, GIF, BMP, TIFF, or ICO file. The image is decoded into raw pixel data in your browser — nothing is sent to a server.
- 2. Choose Scale & Algorithm: Select an integer scale factor (2× to 16×) and choose your algorithm. Use Nearest-Neighbour for a perfect pixel-perfect copy at any scale. Use Eagle or xBR at 2× for smoother diagonal edges.
- 3. Upscale & Download: Click Upscale Pixel Art. The tool writes output pixel data directly to a canvas with
imageSmoothingEnabled = falsefor nearest-neighbour, or runs the Eagle/xBR algorithm pixel-by-pixel for the enhanced modes. Preview the result side-by-side and download as PNG, JPEG, or WebP.
The Three Upscale Algorithms Explained
- Nearest-Neighbour: The safest and most widely compatible algorithm. Each source pixel is replicated into an N×N block of identical pixels. No colours are changed, no blending occurs. Works at all scale factors and is the correct choice for most pixel art upscaling tasks.
- Eagle (2× only): Each source pixel expands to a 2×2 block. Each corner of the block checks its two adjacent edge neighbours — if both match a diagonal neighbour, that colour is used for the corner pixel, effectively rounding gentle diagonal transitions. Flat areas remain pixel-perfect.
- xBR (2× only): A more sophisticated edge-direction algorithm. It analyses colour differences along all four diagonal and orthogonal directions around each pixel and blends sub-pixel corners proportionally to strengthen diagonal edges. Produces smoother curves than Eagle while avoiding blurring on flat colour regions.
Why Integer Scaling Matters for Pixel Art
Standard image resizers support arbitrary scale factors (e.g. 1.5× or 2.7×), which require fractional pixel mapping. This always introduces interpolation — some source pixels map to partial output pixels, forcing colour blending at every boundary. Integer scaling (2×, 3×, 4×…) means every source pixel maps to an exact N×N block with no fractions. The result is a lossless, artefact-free enlargement where every colour and edge is preserved exactly. This is why all professional pixel art software and game engines offer integer scale settings, and why this pixel art upscaler only supports integer scale factors.
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Frequently Asked Questions About Pixel Art Upscaler
A pixel art upscaler enlarges low-resolution pixel art and sprites by exact integer multiples without blurring or colour interpolation. Unlike standard image resizers that average neighbouring pixels, a pixel art upscaler replicates each source pixel into a uniform block of identical pixels, preserving every hard edge and colour boundary exactly as the original artist intended.
Standard image resizers use bilinear or bicubic algorithms that average neighbouring pixel colours to create smooth transitions. This deliberately blurs hard edges — which is useful for photos but destroys the crisp aesthetic of pixel art. A dedicated pixel art upscaler uses nearest-neighbour interpolation instead, which never blends colours across boundaries.
Use Nearest-Neighbour for the safest, most faithful result at any scale factor. It produces a perfect integer copy with zero colour changes. Use Eagle 2× if you want gentle smoothing on diagonal lines while keeping flat pixel areas intact. Use xBR 2× for more sophisticated diagonal edge smoothing — it produces slightly rounder curves than Eagle. When in doubt, Nearest-Neighbour is always correct for pixel art.
Eagle and xBR are specifically designed as 2× algorithms — their pixel-mapping rules operate on 2×2 output blocks generated from each source pixel. Extending them to 3× or 4× requires a different set of rules (e.g. hq3× or hq4×) that have different trade-offs. For scales above 2×, Nearest-Neighbour is the correct and recommended choice.
Completely. This pixel art upscaler runs entirely in your browser using the Canvas API. Your image is never uploaded to any server, never stored, and never transmitted over the network. It stays on your device throughout the entire upscaling process.
Choose the scale factor based on your target resolution. A 32×32 sprite at 4× becomes 128×128 px. At 8× it becomes 256×256 px. For print use, aim for at least 4× to reach a resolution where standard printers can render detail cleanly. For game engines that support HiDPI displays, 2× is often sufficient for 2× Retina screens.
PNG is strongly recommended. It is lossless and compresses block-colour images extremely efficiently — upscaled pixel art often compresses better than the original at the same colour depth because repeated identical blocks compress well. JPEG introduces compression artefacts at colour boundaries. WebP offers a good size-quality balance with lossless support.
There is no enforced limit, but the output canvas size is bounded by browser memory. A 512×512 image at 16× produces a 8192×8192 canvas (67 megapixels), which may be near the canvas size limit on some browsers. For very large outputs, use a smaller scale factor or process the image in sections. Most practical pixel art (16×16 to 256×256) works at all scale factors without issue.