Carcha Labs · Istanbul

Software built on published standards.

Three products: a licensing kit for desktop software, an API monitoring tool and a floor plan visualizer. Each one has a demo you can open without an account.

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Products

Three products, one standard of work

Visualizer

Turn an IFC model or a PDF floor plan into a 3D scene you can light, walk through and share.

Inputs
IFC, PDF
Scene
Floors, tiles, objects, daylight
Views
Walk mode, VR
Output
Share link, quantity takeoff

Visualizer product pageOpen the demo

  1. Step 1UploadAn IFC model or a vector PDF of the plan.
  2. Step 2Edit in 2DFix walls, openings and rooms on the plan.
  3. Step 3Dress in 3DFloors, tiles, objects and sun position.
  4. Step 4ShareA read-only link anyone can open.

LicenseKit

Issue, activate and check licenses for desktop software with signed leases that also work offline.

Token
Compact JWS, Ed25519
Licensing
Seats, transfers, deactivation
Offline
Grace period, clock checks
SDK
Electron first, plain Node

LicenseKit product pageOpen the sandbox

Example lease · signed with Ed25519

eyJhbGciOiJFZDI1NTE5IiwidHlwIjoibGljZW5zZWtpdC1sZWFzZStqd3QiLCJraWQiOiIyMDI2LTEwIn0.eyJpc3MiOiJodHRwczovL2xpY2Vuc2VraXQuY2FyY2hhbGFicy5jb20iLCJhdWQiOiJleGFtcGxlLWFwcCIsInN1YiI6ImN1c180SDhUUTIiLCJqdGkiOiJsc18zSE5WOFIyQyIsImlhdCI6MTc5MTcyNzIwMCwibmJmIjoxNzkxNzI3MjAwLCJleHAiOjE3OTE4MTM2MDAsImxpZCI6ImxpY183UTJNNEs5WCIsImZwIjoic2hhMjU2OjljMWU0YjdhIiwiZmVhdCI6WyJleHBvcnQiLCJ2ciJdLCJyZXYiOjN9.UWL6wVkF7vvXMxuFudzGs-N5AiOKu57dwO82StMyw24SbVSBx0i6iFeSZd7MrBQCDaIpfd0oj3DvePrapV05Ag

HeaderClaimsSignatureSignature verified, key 2026-10
alg · kid
Ed25519 · 2026-10
aud
example-app
exp
12 Oct 2026, 14:00 UTC
feat
export, vr
Last checkonlineDay 9
  1. valid
  2. grace
  3. invalid
  4. clock_suspect

Online. The signature checks out against key 2026-10. The next server check is due in 24 hours.

Monitoring Tool

Send your API requests to one place and see error rates, latency and SLO alerts per endpoint.

Collects
API requests, in batches of up to 100
Shows
Requests, errors, latency per endpoint
Alerts
SLO burn rate, email and signed webhook

Monitoring Tool product pageOpen the demo

Example API · last 30 minutes

1,338requests / min
0.00%5xx rate
897 msp95 latency

Requests per minute; the darker part is 5xx errors. Point at a bar to see that minute.

SLO availability 99.9% · burn rateHealthy, both windows below 14.4×
1 h window 0.0×5 min window 0.0×Pages only when both are above 14.4×
EndpointReq / min5xxp95
GET /api/designs5350.00%42 ms
GET /s/{id}4010.00%21 ms
GET /api/surfaces1610.00%32 ms
POST /api/share1340.00%59 ms
POST /api/uploads1070.00%897 ms

Standards

Built on published standards

Each technical claim on this site links to the document it relies on, so you can check it yourself.

  • ISO 16739-1Industry Foundation Classes. Visualizer imports building models in this format.Used by: VisualizerbuildingSMART: IFC
  • WebXR Device APIW3C specification behind the Visualizer VR mode.Used by: VisualizerW3C: WebXR
  • RFC 7515JSON Web Signature. LicenseKit leases are compact JWS tokens.Used by: LicenseKitRFC Editor: RFC 7515
  • RFC 9864Fully specified algorithms for JOSE. LicenseKit accepts Ed25519 and nothing else.Used by: LicenseKitRFC Editor: RFC 9864
  • RFC 8725JSON Web Token best current practices. The lease validator follows them.Used by: LicenseKitIETF: RFC 8725
  • WCAG 2.2 AAAccessibility target for this site and every product interface.Used by: All three productsW3C: WCAG 2.2

About

Software for problems met in real engineering work

Carcha Labs builds software for problems that come up in day-to-day engineering: showing a floor plan in 3D, protecting desktop software, and knowing when a service misbehaves. Every product page states its limits next to its features.

About Carcha Labs

Questions, bug reports or a walkthrough of a product

Messages go straight to engineering, not to a sales queue.

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