DataEngUtils for AI Engineers
AI Engineers build applications that integrate with LLMs, APIs, and vector databases, which means spending a significant amount of time debugging authentication tokens, validating JSON payloads, encoding request bodies, and managing API keys. Every integration with OpenAI, Claude, or a custom model endpoint involves inspecting JWT tokens, formatting JSON responses, base64-encoding request payloads, and generating unique API credentials. Online tools for these tasks require pasting sensitive tokens and API keys into browser tabs, which is a security risk. DataEngUtils provides the same utilities on your Mac with complete privacy. This page organizes the tools most relevant to AI Engineers into the workflows you handle daily.
Tools for ai engineers
- JWT DebuggerDecode and inspect JSON Web Tokens on macOS without pasting bearer tokens into a public JWT debugger
- JSON FormatterJSON Formatter is built for data engineers who need to validate and format pipeline configs, warehou
- JSON ValidatorJSON Validator is built for data engineers who need to validate and format pipeline configs, warehou
- JSON Path TesterJSON Path Tester is built for data engineers who need to inspect, debug, and explain data artifacts
- Regex TesterRegex Tester is built for data engineers who need to inspect, debug, and explain data artifacts when
- Base64 Encode/DecodeBase64 Encode/Decode is built for data engineers who need to encode and decode payloads for APIs, lo
- URL Encode/DecodeURL Encode/Decode is built for data engineers who need to encode and decode payloads for APIs, logs,
- Gzip Base64Gzip Base64 is built for data engineers who need to encode and decode payloads for APIs, logs, and s
- JWT EncoderJWT Encoder is built for data engineers who need to encode and decode payloads for APIs, logs, and s
- Hash IdentifierHash Identifier is built for data engineers who need to inspect, debug, and explain data artifacts w
- API Key GeneratorAPI Key Generator is built for data engineers who need to generate identifiers, test rows, and mock
- Hash GeneratorHash Generator is built for data engineers who need to generate identifiers, test rows, and mock pay
Workflow: Debug API authentication tokens
Inspect and decode JWT tokens from authentication flows, verify claims, and encode new tokens for testing — all without sending them to a web-based debugger.
1. Paste a JWT token
Open the JWT Debugger and paste any JWT from your application's auth flow. The header, payload, and signature are decoded instantly on your machine.
2. Inspect claims and timestamps
Review the decoded claims — issuer, subject, expiration, and custom claims — to verify correctness. Timestamps are shown in human-readable format.
3. Encode a new test token
Use JWT Encoder to create test tokens with custom headers and payloads for integration testing without a running server.
Workflow: Validate LLM response structures
Format and validate JSON responses from LLM APIs, test JSON Path expressions, and validate response schemas to ensure structured output parsing works correctly.
1. Format an LLM JSON response
Copy a raw JSON response from an LLM API call and paste it into JSON Formatter for pretty-printing and syntax highlighting.
2. Validate against a schema
Use JSON Schema Validator to check that the LLM response matches your expected output schema before passing it to downstream functions.
3. Test JSON Path expressions
Use JSON Path Tester to experiment with JSON Path queries on nested response structures, ensuring your extraction logic is correct.
Workflow: Encode and decode API payloads
Base64-encode binary or text payloads, URL-encode query parameters, and compress request bodies for efficient API calls.
1. Encode a payload
Paste text or binary data into Base64 Encode/Decode to encode it for API transmission, or decode incoming payloads to inspect their contents.
2. Encode URL parameters
Use URL Encode/Decode to encode query string parameters or decode incoming URLs for debugging API request routing.
3. Compress request bodies
Use Gzip Base64 to compress large JSON payloads before sending them to APIs that accept compressed request bodies.
Workflow: Generate secure API keys and secrets
Create API keys, hash secrets, and generate unique IDs for API consumers — all offline with no risk of key leakage.
1. Generate an API key
Open API Key Generator and configure key length, prefix, and character set. Generate single keys or batches for testing.
2. Hash a secret
Use Hash Generator to create SHA-256 hashes of API secrets for storage in your database or config file.
3. Test regex patterns
Use Regex Tester to validate that API key formats match your expected patterns before rolling them out to consumers.