Skip to main content
On premises privacyOpenAI · LLaMA Index · Open TelemetryJSON/JSONL, up to 10MBNo SDK is required

Load Trace File

Supported formats: PDF (via GitHub), DOCX, ODT, EPUB, MOBI, HTML

LC
LangChain

JSON with run_id and nested child_runs

OT
OpenTelemetry

OTLP JSON with resourceSpans or flat JSONL with traceId+spanId.

LI
LlamaIndex

JSONL with event_type and parent_id (CBEventType).

How it works

Export the log

From LangChain use FileCallbackHandler. From LlamaIndex, CBEventHandler. From OpenTelemetry, otlp-json exporter.

Upload the file

JSON or JSONL up to 10 MB. The parser automatically detects the format.

Explore the tree

Expand nodes, click for details: Input, Output, Latency, Tokens, Cost €, Errors.

Data protection guaranteed

Everything happens in the browser. No data sent to the server. No required SDKs.

Unique Selling Proposition (USP) vs Langsmith/Heliconet

FunctionalityThis toolLangSmithHelicone
Required SDKNothing to translate!YesSi
Host in the CloudNeverAlwaysSempre
MultiformatLow Code + Open Technology + Low-Code IntegrationOnly Local Cache (LC) is supported for now.Partial
PriceFreeFree-to-play model that offers basic features for free and premium content or services at a cost, often through in-app purchases.Free-to-play model that offers basic features for free and premium content or services at a cost, often through in-app purchases.