97 specs · 2,000+ tests · MIT toolchain

The glTF pipeline your CI actually trusts.

Real-time validation, deterministic optimization, and a 6-view perceptual quality gate. Same pipeline locally and on every PR — shipping a 3D regression to production becomes the path of more resistance.

Drop a .glb — free→See it on a real asset

avg compression: 47%
corpus assets: 84
presets: 3
specs shipped: 97

DamagedHelmet.glb

3.60 MB·15,452 tris

web-mobile preset

87.7%smaller·ΔE94 1.4

analyze: passed14/14 conformance · 0 USDZ warns

Try a sample

Powers the standards your runtime already speaks

Shopify 3Dproduct viewers
Apple USDZQuick Look + AR
Khronos glTF2.0 + extensions
Pixar USDround-trip
GitHub ActionsCI gate
VS Code8 commands

Live demo

See the analyzer on real assets.

Every sample is a license-verified Khronos reference model. Switch tabs to swap the model and the readout in lockstep — no special-case path, the same pipeline you'd get from spatialpack analyze.

DamagedHelmet.glb

3.60 MB·15,452 tris

drag · scroll · double-tap to resetdownload source ↓

spatialpack analyzeDamagedHelmet.glb

core@0.1.0

web-mobile preset

87.7%smaller(3.60 MB → 452.3 KB)

saves 3.16 MB per request

triangles: 15,452
draw calls: 1
predicted frame: 10.60 ms
predicted GPU mem: 11.55 MB
texture pipeline: webp + meshopt
cohort: textured · medium-poly
extensions: KHR_materials_unlit
license: CC-BY 4.0

analyze: passed·14/14 conformance · 0 USDZ warnings

The reference asset every WebGL engine ships against. Heavy PBR maps; ideal stress test for texture pipelines.

Surface

One pipeline, six superpowers.

Everything below ships in the same CLI, embeds in the same GitHub Action, and exports via the same MCP server. No picking and choosing — and no proprietary lock-in.

Analyze

Triangle counts, draw calls, predicted frame, predicted GPU memory, extension audit — in milliseconds, deterministic.

Drop a file →

Optimize

web-mobile / web-desktop / quality-max presets. Meshopt + WebP + KTX2. Average 65% reduction across the bench, with ΔE94 gating.

See the bench →

6-view visual diff

Same perceptual gate runs locally and on every PR. ΔE94, SSIM, per-view tiles, threshold-fails the build before a regression ships.

Open Compare →

USDZ parity

12+ Apple-AR breaking checks that usdchecker misses — metersPerUnit, progressive JPEG, palette PNG, iridescence drop-on-export.

Validator catalog →

Texture dedup

Content-hashed image dedup across glTF / USD bundles. The single fastest path to a “why is my catalog 400 MB” fix.

Read the spec →

Embedding search

Drop one asset, find the 5 closest in your library. CLIP-style retrieval over geometry + textures, no proprietary index.

Try it on a sample →

Quick-View gallery

Browse the bench corpus (free) or your own analyzed-asset history (Pro). Filters, favorites, and saved views in one click.

Open the gallery →

Bench

Top reductions on 3DAssetBench.

54 license-verified Khronos sample assets, web-mobile preset. Average reduction across the corpus: 65.0%. Regressions included. Full table at /3dassetbench.

asset

tris

in → out

reduction

GlassHurricaneCandleHolder4,920 tris · 2.58 → 0.11 MB
4,920
2.58 → 0.11 MB
95.8%
BoomBox6,036 tris · 10.12 → 0.55 MB
6,036
10.12 → 0.55 MB
94.6%
WaterBottle4,510 tris · 8.55 → 0.57 MB
4,510
8.55 → 0.57 MB
93.3%
MaterialsVariantsShoe13,780 tris · 7.47 → 0.57 MB
13,780
7.47 → 0.57 MB
92.4%
MosquitoInAmber4,096 tris · 23.11 → 2.32 MB
4,096
23.11 → 2.32 MB
89.9%
BarramundiFish4,068 tris · 11.91 → 1.25 MB
4,068
11.91 → 1.25 MB
89.5%
Lantern5,394 tris · 9.12 → 1.07 MB
5,394
9.12 → 1.07 MB
88.2%
ABeautifulGame96,084 tris · 40.99 → 3.91 MB
96,084
40.99 → 3.91 MB
88.0%
DamagedHelmet15,452 tris · 3.60 → 0.44 MB
15,452
3.60 → 0.44 MB
87.7%

The same pipeline runs on every PR.

Install the GitHub Action; every PR that touches a .glb gets this comment with a fidelity badge from a 6-view perceptual diff. Threshold breach fails the build.

acme/storefront·PR #481·add hero AR product

github-actionsbotcommented·just now

spatialpack@0.1.0

spatialpackpassedΔE941.3SSIM0.997size−87.7%USDZokconformance2 warns

file	hero.glb · main → hero-ar
size	3.60 MB → 0.44 MB (−87.7%)
ΔE94 max	1.4 (worst view: front-elev-30°)
SSIM min	0.997
frame est.	10.6 ms (target ≤ 16.7 ms)
GPU mem	11.55 MB (target ≤ 64 MB)
conformance	12/14 passed · 2 warns (usdz_meters_per_unit_not_one, usdz_jpeg_progressive)

visual diff · 6 viewsall under threshold

frontΔE 0.9

backΔE 1.1

leftΔE 1.4

rightΔE 0.7

topΔE 1.0

isoΔE 1.2

Conformance

Catches what usdchecker misses.

Apple's usdchecker covers the spec. We cover the spec and the long list of silent failures that ship to a customer's iPhone anyway.

tag

source

severity

what we catch

usdz_no_default_stageUSDZFAIL
USDZFAILFirst archive entry isn't a .usd/.usda/.usdc — Quick Look refuses to open the file.
usdz_entry_compressedUSDZFAIL
USDZFAILEntry uses DEFLATE; USDZ requires STORE (0). Apple's loader won't read it.
usdz_entry_unalignedUSDZFAIL
USDZFAILEntry data isn't 64-byte aligned; required for memory-mapped reads on iOS.
usdz_file_size_budget_exceededARWARN
ARWARNOver Apple's ~25 MB Quick Look budget. iOS will start, but stutter on cellular.
usdz_meters_per_unit_not_oneUSDZWARN
USDZWARNmetersPerUnit ≠ 1.0 → AR scale wrong on placement. usdchecker is silent on this.
usdz_up_axis_not_yUSDZWARN
USDZWARNZ-up stage → asset lands on its side in Quick Look. Reality Composer assumes Y-up.
usdz_png_palette_detectedUSDZWARN
USDZWARNPalette PNG (color type 3) — Quick Look skips it silently. Convert to truecolor.
usdz_png_bit_depth_unsupportedUSDZWARN
USDZWARN>8 bpc PNG — re-encode at 8-bit per channel; iOS caps depth here.
usdz_png_invalid_headerUSDZFAIL
USDZFAILFile is named .png but lacks the PNG signature / IHDR chunk.
usdz_jpeg_progressiveUSDZWARN
USDZWARNProgressive JPEG (SOF2) — Quick Look prefers baseline DCT. Re-encode without progressive.
usdz_jpeg_invalid_headerUSDZFAIL
USDZFAILJPEG missing the SOI (FF D8) start marker.
material_may_not_roundtrip_to_usdzARWARN
ARWARNUses iridescence / volume / clearcoat / sheen — drops on USDZ export. Test on-device.
missing_texture_assetglTFFAIL
glTFFAILStage references an image that isn't in the archive. Quick Look renders white.
wrong_extensionglTFFAIL
glTFFAILFile extension misrepresents the contents.

14 of 14 shown · glTF / USDZ / AR Quick Look · sourced from packages/core/src/usdz.ts and conformance.ts

Receipts

Numbers, not adjectives.

97
Specs shipped: 2,000+
Tests passing: 65%
Average reduction: 8
VS Code commands: 50+
SDK methods: 14
Conformance checks

Try it

Run this on your own .glb.

No sign-up, no proprietary container. We process the file in-memory, hand you back a downloadable .glb and a shareable report URL. 25 MB max in the public surface.

.glb · .gltf · 25 MB max

Drop a .glb here, or click to choose

runs the same pipeline as spatialpack optimize --preset web-mobile

or — install on CI:npm i -g @spatialpack/cliuses: spatialpack/spatialpack-action@v0

Pricing

Free to try. Pay when you scale.

Drop a file, get a report, take the optimized GLB — free for the first few. Upgrade when you’re shipping a catalog and need every preset, unlimited jobs, and the Shopify integration.

See full comparison→

[01] Free

$0forever

Try the optimizer on a couple of assets. CLI + MCP server included.