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API Key Checker & Validator (100% Offline)

Identify API key types and get ready-to-run validation commands. Supports 455+ services. No server processing, complete privacy.

100% Client-Side

Keys never leave your browser

455+ Patterns

AWS, GitHub, Stripe, Slack & more

Ready Commands

Copy & run validation commands

Risk Assessment

Understand potential impact

Paste Your API Key or Secret
Paste any API key, token, or secret to identify its type and get a ready-to-run validation command. Works with raw keys or labeled formats like AWS_SECRET_ACCESS_KEY=xxx
Supported Services
We can detect and provide validation commands for 455+ patterns across 350+ services (410+ high-confidence) including:
AWSGitHubGitLabStripeSlackGoogle CloudFirebaseSendGridTwilioDiscordTelegramNPMOpenAIAnthropicHuggingFaceAuth0SupabasePostmanCoinbaseBinanceRazorpayPaystackFlutterwavePlaidSalesforceHubSpotPipedriveIntercomJiraFigmaClickUpMonday.comAzureAzure DevOpsDigitalOceanHerokuVercelNetlifyRailwayFly.ioRenderMongoDBRedisPlanetScaleNeonTursoPineconeWeaviateQdrantCloudflareDataDogNew RelicSentryGrafanaAxiomPostHogDopplerLaunchDarklyContentfulSanityWebflowClerkLiveblocksResendShopifySquarePayPalPubNubMuxAppwriteAivenTinybirdTrigger.devAlibaba CloudHashiCorp VaultTerraform CloudPulumiJFrogHarnessScalewayLinodeVultrNuGetApifyFacebookInstagramOktaSnykBrexDropboxShodanCalendlyBrowserStackSauceLabsRollbarBugsnagElevenLabsDeepgramGroqPerplexityStability AIAlchemyInfuraEtherscanZoomDocuSignRubyGemsand 40+ more...

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What is the API Key Checker?

The API Key Checker is a free, client-side security tool designed for developers, security professionals, penetration testers, and bug bounty hunters. It instantly identifies the type of API key, token, or secret you've discovered and provides everything you need to understand and validate it.

With support for 455+ patterns across 350+ services, including AWS, GitHub, Stripe, OpenAI, and many more, this tool helps you quickly assess discovered credentials during security assessments or incident response.

Key Features

Instant Detection
  • • Paste any API key and instantly identify the service
  • • 410+ high-confidence patterns for accurate detection
  • • Supports both unique prefixes and labeled patterns
  • • Multiple match detection for ambiguous keys
Ready-to-Run Commands
  • • Pre-filled curl commands for each key type
  • • One-click copy to clipboard
  • • Validate if the key is active or revoked
  • • Expected response guidance
Risk Assessment
  • • Critical, High, Medium, Low risk levels
  • • Detailed impact analysis per service
  • • What the key can access if compromised
  • • Confidence scoring for detections
Remediation Guidance
  • • Step-by-step rotation instructions
  • • Direct links to service documentation
  • • Best practices for key management
  • • Service-specific revocation guides

Supported Services

Cloud Providers

  • • AWS (Access Keys, Secret Keys, Session Tokens)
  • • Google Cloud (API Keys, OAuth, Service Accounts)
  • • Azure (Client Secrets, Storage Keys, DevOps PATs)
  • • DigitalOcean, Linode, Vultr, Cloudflare

Development Tools

  • • GitHub (PATs, Fine-grained tokens, App tokens)
  • • GitLab, Bitbucket, Azure DevOps
  • • NPM, PyPI, RubyGems, Crates.io
  • • Vercel, Netlify, Heroku, Railway

AI & ML Services

  • • OpenAI, Anthropic, HuggingFace
  • • Cohere, Replicate, Stability AI
  • • Google AI, Azure OpenAI

Payment & Finance

  • • Stripe, Square, PayPal, Braintree
  • • Plaid, Coinbase, Binance
  • • Razorpay, Paystack, Flutterwave

Communication

  • • Slack (Bot, User, App, Webhook tokens)
  • • Discord, Telegram, Microsoft Teams
  • • Twilio, SendGrid, Mailgun, Mailchimp

SaaS & APIs

  • • Salesforce, HubSpot, Intercom
  • • Jira, Notion, Figma, Linear
  • • DataDog, Sentry, New Relic, Splunk

Privacy First

Unlike online validators that send your keys to remote servers, our tool runs entirely in your browser. Your sensitive credentials are never transmitted, stored, or logged. This makes it safe to use even with production keys during incident response.

  • 100% client-side JavaScript processing
  • No network requests with your keys
  • No analytics or tracking on input data
  • Works offline after initial page load

Use Cases

Bug Bounty Hunting

Quickly identify and validate secrets found during reconnaissance. Get instant validation commands to prove impact in your reports.

Penetration Testing

Verify if discovered credentials are active during security assessments. Understand the blast radius of compromised keys.

Incident Response

Rapidly assess the impact of leaked credentials. Identify affected services and get remediation steps immediately.

Developer Security

Check if accidentally committed keys are still valid. Verify key rotation was successful after credential exposure.

Security Audits

Audit codebases for exposed secrets. Identify the service and risk level of any discovered API keys or tokens.

How It Works

1

Paste Your Key

Enter any API key, token, or secret into the input field. The tool accepts single keys or text containing multiple secrets.

2

Pattern Matching

The tool runs your input against 455+ regex patterns for different services. High-confidence patterns (unique prefixes like ghp_,sk-ant-, AKIA) are prioritized.

3

Results & Guidance

View the identified service, risk level, what the key can access, and get ready-to-run validation commands with expected responses.

Limitations & Notes

  • Pattern-based detection: Some services use generic key formats that may result in multiple possible matches. High-confidence patterns are prioritized in results.
  • Validation is manual: The tool provides validation commands but does not automatically execute them. You must run the commands yourself.
  • API changes: Validation commands are based on current API documentation. Some endpoints may change over time.
  • Authorization context: Only test keys you have authorization to validate. Unauthorized access attempts may violate terms of service.

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Frequently Asked Questions