Developer Debug Tools

One workspace for developer data

Developer Data & API Debugging Workspace

Inspect, validate, decode, convert and debug developer data directly in your browser.

Work through JSON payloads, JWT tokens, logs, headers, encoded values, API requests, responses and timestamps without creating a scratch project.

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Paste once. Choose the next action.

Detected input

JSON payload

FormatValidateMinifyTypeScriptJava DTO
{
  "requestId": "req_7f42",
  "status": 422,
  "debugLocally": true
}

Start with the problem

Move from raw data to the next debugging decision

Choose the workflow that matches what you are investigating. Each path connects focused tools instead of dropping you into a wall of utilities.

API Payload Debugging

Format responses, validate JSON, inspect schemas and compare payload changes.

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JWT Inspection

Read claims, check expiry and spot risky token configuration without confusing decode with verification.

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Log Analysis

Clean noisy logs, extract trace IDs and connect failures across service boundaries.

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Timestamp Investigation

Compare Unix seconds, milliseconds, UTC and local dates while debugging events and token expiry.

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Data Conversion

Move between JSON, YAML, Java DTOs and request formats without writing a scratch script.

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Encoding & Decoding

Inspect Base64, URL encoding and escaped values copied from requests, logs and integrations.

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Your pasted data stays in this browser tab

Core formatting, decoding, conversion and inspection actions run in your browser. Tool input is not uploaded to a DeveloperDebugTools processing API.

No upload

Tool input is processed client-side.

No raw history

Workspace input is not saved for later sessions.

No account

Start debugging without signing in.

Analytics, advertising and hosting services may still receive standard request or device information as described in the privacy and cookie policies. Always redact active secrets and regulated data.

Popular workflows

Follow a real debugging path

Start with a concrete task, review the result and continue to the next relevant inspection step.

1Debug an API response Format the payload, inspect headers and isolate the response detail that broke the contract.2Inspect a JWT token Decode claims, review expiry and identify checks that still require signature verification.3Decode a Base64 payload Determine whether a copied value is text, structured data or binary before using it elsewhere.4Investigate timestamps Compare seconds and milliseconds, then verify UTC and local-time assumptions.5Validate JSON Find malformed syntax, format the result and continue into Schema or JSONPath checks.

Popular tools

Focused tools for high-value debugging tasks

A curated set of the strongest inspectors, analyzers and formatters—without a giant tool wall.

Browse the full directory

JSON Formatter

Pretty-print raw JSON, minify payloads, and inspect syntax errors with clear feedback.

JWT Security Inspector

Decode JWTs, inspect expiry, issuer, audience, algorithm choices, and common token security mistakes.

API Log Analyzer

Analyze API logs for ERROR/WARN/INFO counts, duplicate exceptions, correlation IDs, and timeline buckets.

HAR File Analyzer

Analyze browser HAR files for slow requests, failed calls, duplicates, domains, and timing waterfalls.

Header Parser

Parse raw HTTP headers into readable key and value pairs for request and response debugging.

Timestamp Converter

Convert Unix seconds, Unix milliseconds, and ISO date strings with readable UTC and local output.

OpenAPI / Swagger Diff Checker

Compare OpenAPI or Swagger JSON/YAML files for added, removed, and potentially breaking API changes.

Encoding Inspector

Detect Base64, hashes, UUIDs, JWT-looking strings, URL encoding, and show safe decoding attempts.