BrickPixel vs BMBrick: Best LEGO Mosaic Generator Compared

BrickPixel vs BMBrick: Feature Comparison

Both tools convert a photo into a grid of LEGO-compatible studs, but the similarities end there. Here is a detailed comparison on every dimension that affects the final build.

Pricing: free tier vs fully free

BrickPixel operates on a freemium model. The free tier lets you upload a photo and generate a basic mosaic preview, but the export features, higher resolution outputs, and full color palette are locked behind paid plans. The exact pricing depends on the tier, but the pattern is consistent: the free version gives you a taste, and the paid version gives you the tools to actually build.

BMBrick is free with no paywall. Every feature is available on every project: full color palette, all three sizes, parts list export, BrickLink XML, cost estimates, and symbol-based PDF instructions. There is no account, no subscription, and no upsell. The tool runs entirely in your browser, so your photo never leaves your device.

BrickPixel's Pro plan at roughly $4.99/month unlocks higher resolution exports and a wider palette. For a casual user making one or two mosaics a year, that subscription cost adds up compared to BMBrick's zero-cost model.

The cost difference matters most for builders who are testing multiple photos or comparing size options before committing. With BrickPixel, each test on the paid tier costs money. With BMBrick, you can experiment as much as you want at no cost.

Color accuracy: the biggest difference

Color accuracy is where BMBrick pulls ahead most clearly. The quantization engine uses perceptual color matching, which means it evaluates how colors look to the human eye rather than just their mathematical distance in RGB space. This matters for skin tones, hair gradients, and subtle shadows where two colors might be mathematically close but visually distinct.

BrickPixel's free tier may offer 15–20 colors, which works for bold graphic designs but struggles with photorealistic portraits. BMBrick's 42-color PAB palette includes intermediate shades like Dark Tan, Sand Green, and Medium Azure that bridge the gap between skin tones and backgrounds.

Size flexibility: locked vs open

BrickPixel's size options depend on your plan. The free tier typically limits you to smaller formats, with larger sizes available on paid plans. This means the size decision is tied to your subscription level, not your project needs.

BMBrick offers 48×48, 64×64, and 96×96 on every project. The 64×64 format is the portrait sweet spot for most photos, giving 4,096 studs enough room for faces, eyes, and hair edges. The 96×96 format handles wall-art projects at 9,216 studs. You can test all three sizes on the same photo before ordering a single brick.

Size flexibility matters when the display context is uncertain. A mosaic designed for a desk might need to move to a wall; a wall piece might need to shrink for a shelf. BMBrick lets you explore all options without hitting a paywall.

Export quality: preview vs build-ready

A mosaic generator is only as useful as its exports. The preview image tells you whether the design looks good on screen, but the parts list, cost estimates, and instruction PDF tell you whether the design is actually buildable.

BMBrick generates a complete parts list with exact color counts, estimated costs through LEGO Pick a Brick and Webrick, and a BrickLink XML export for marketplace ordering. The PDF instructions use high-contrast symbols on 16×16 grid pages, designed for long build sessions where color-only instructions would cause fatigue and misplacement errors.

BrickPixel's export quality depends on the plan. The free tier gives you a basic grid image. Paid tiers add parts list export, but the depth of the cost estimates and instruction format varies. If you are planning a 48×48 or larger mosaic with 30+ colors, the export quality is what separates a good preview from a buildable project.

Privacy: server-side vs local processing

BrickPixel processes images on its servers. Your photo is uploaded, processed, and stored according to the platform's privacy policy. This is standard for cloud-based tools, but it means your photo leaves your device.

BMBrick processes everything locally in your browser. The photo never leaves your device, and there is no server-side storage. This matters for personal photos, family portraits, and pet photos where privacy is a concern.

If you are designing a pet portrait or family photo as a gift, the person in the photo may not expect their image to be uploaded to a third-party server. BMBrick's local processing means the photo stays on your device — there is no privacy policy to read, no data retention to worry about, and no risk of the image appearing in someone else's training data.

When BrickPixel is a reasonable choice

BrickPixel works fine for quick previews where you just want to see what a photo looks like as a mosaic. If you do not plan to build the mosaic, or if you only need a rough idea before commissioning someone else to design it, the free tier gives you that preview without any commitment.

If you are already on a paid BrickPixel plan and are happy with the export quality, there is no urgent reason to switch. The tool does what it promises at the tier you have chosen.

When BMBrick is the stronger option

BMBrick is the better choice when the final build matters. If you are planning to actually order bricks, assemble the mosaic, and display it, the tool's full palette, three size options, parts list, cost estimates, and symbol-based instructions give you everything you need to go from photo to finished project.

• Compare the same photo on both tools — BMBrick will show 42–60 color assignments vs BrickPixel's 15–20 on the free tier.
• The parts list export alone saves 30–60 minutes of manual counting.
• Cost estimates let you compare PAB vs Webrick vs BrickLink before committing to a route.

How BMBrick helps with this decision

BMBrick is built around the idea that a mosaic tool should help you make better decisions before you spend money. The free parts list and cost estimates let you compare LEGO Pick a Brick and Webrick routes before placing an order. The three size options let you test whether the photo works at different resolutions. The color palette preview shows you exactly which shades the quantizer chose, so you can adjust before committing.

If you are deciding between BrickPixel and BMBrick for a real project, the simplest test is to run the same photo through both tools and compare the color counts, the parts list, and the cost estimate. The tool that gives you more information before you buy bricks is the one that reduces the risk of the final build.

Where To Go Next

Next reads:

• PAB vs BrickLink — Compare the two main sourcing routes once you have a parts list from BMBrick.
• How Many Pieces? — Estimate whether 48×48, 64×64, or 96×96 is the right size for your photo.
• Choose the Right Photo — Pick a source image that works well at the mosaic size you want.