# DeBounce Knowledge Base > Official help center for DeBounce email validation and verification. Guides, tutorials, and troubleshooting for bulk list validation, the real-time API, JavaScript widget, WordPress plugin, Zapier, and 100+ platform integrations. ## Help Desk - [Knowledge Base Home](https://help.debounce.com/): Searchable help center for DeBounce customers - [Help Desk Overview](https://help.debounce.com/help-desk/): Main entry point for all support categories ## Getting Started - [Getting Started](https://help.debounce.com/getting-started/): New user onboarding and account basics - [How to Request Support?](https://help.debounce.com/getting-started/contact-us/): Contact DeBounce support - [Overview and Begin](https://help.debounce.com/getting-started/overview-and-begin/): Platform overview and first steps - [Our Guarantee](https://help.debounce.com/getting-started/guarantee/): DeBounce accuracy and deliverability guarantee - [What is Validation Credit?](https://help.debounce.com/getting-started/what-is-validation-credit/): How validation credits work - [Validation Speed](https://help.debounce.com/getting-started/engine-speed/): Expected processing times for bulk validation ## Video Tutorials - [Video Tutorials](https://help.debounce.com/tutorial/): Step-by-step video guides for DeBounce features - [Bulk Email Validation](https://help.debounce.com/tutorial/bulk-email-validation/): Upload and validate email lists in bulk - [Single Email Validation](https://help.debounce.com/tutorial/single-email-validation/): Validate individual email addresses - [Real-time JS Widget](https://help.debounce.com/tutorial/real-time-js-widget/): Add real-time validation to web forms - [Integrations](https://help.debounce.com/tutorial/the-integrations/): Connect DeBounce with marketing platforms - [Plans & Pricing](https://help.debounce.com/tutorial/plans-pricing/): Credit plans and billing overview ## Understanding Results - [Understanding Results](https://help.debounce.com/understanding-results/): Email validation result codes and statuses - [Understanding Result Codes](https://help.debounce.com/understanding-results/result-codes/): Complete list of validation result codes - [What are Accept-all & Unknown?](https://help.debounce.com/understanding-results/acceptall-unknown/): Catch-all and unknown status explained - [What is Risky Email?](https://help.debounce.com/understanding-results/what-is-risky-email/): Risky email classification - [How to Avoid Fake Signups and Bots on SaaS Platforms?](https://help.debounce.com/understanding-results/avoid-fake-signups-on-saas/): Prevent bot and fake signups ## Acceptable Files - [Acceptable Files](https://help.debounce.com/acceptable-files/): Supported file formats for bulk upload - [Creating a TXT (Text) file](https://help.debounce.com/acceptable-files/txt/): Prepare a text file for upload - [Convert Excel to CSV](https://help.debounce.com/acceptable-files/convert-excel-to-csv/): Convert spreadsheets for validation - [Can I Have Other Columns on My CSV?](https://help.debounce.com/acceptable-files/can-i-have-other-columns-on-my-csv-list/): Extra columns in upload files ## Billing - [Billing](https://help.debounce.com/billing/): Payments, invoices, and credit management - [Email Validation vs Catch-All: Credit Usage Explained](https://help.debounce.com/billing/email-validation-vs-catch-all/): How credits are consumed per validation type - [Remove Tax from the Invoice](https://help.debounce.com/billing/remove-tax/): Tax exemption on invoices - [How to Update Credit Card Details?](https://help.debounce.com/billing/update-credit-card-details/): Update payment method ## Integrations - [Integrations](https://help.debounce.com/integrations/): Connect DeBounce with email marketing and CRM platforms - [Install DeBounce for Google Sheets](https://help.debounce.com/integrations/debounce-for-google-sheets/): Google Sheets add-on setup - [Getting a MailChimp API Key](https://help.debounce.com/integrations/getting-a-mailchimp-api-key/): MailChimp integration setup - [Getting a SendGrid API Key](https://help.debounce.com/integrations/getting-a-sendgrid-api-key/): SendGrid integration setup ## JavaScript Widget - [JavaScript Widget](https://help.debounce.com/javascript-widget/): Real-time email validation on web forms - [JavaScript Widget Demos](https://help.debounce.com/javascript-widget/demos/): Live demo pages for LeadPages, Unbounce, and HTML forms - [Add Event Listener for a Validation](https://help.debounce.com/javascript-widget/event-listener/): Hook into validation events in JavaScript - [What are the Limits per User or Visitor](https://help.debounce.com/javascript-widget/rate-limits/): Widget rate limits and quotas ## WordPress Plugin - [WordPress Plugin](https://help.debounce.com/wordpress-plugin/): DeBounce email validation for WordPress sites - [WordPress Plugin Installation Guide](https://help.debounce.com/wordpress-plugin/plugin-installation-guide/): Install and configure the plugin - [Supported Forms/Plugins](https://help.debounce.com/wordpress-plugin/supported-plugins/): Compatible WordPress form plugins ## Zapier - [Zapier](https://help.debounce.com/zapier/): Automate DeBounce with Zapier workflows - [Zapier Integrations](https://help.debounce.com/zapier/integrations/): Available Zapier triggers and actions - [What is Zapier?](https://help.debounce.com/zapier/what-is-zapier/): Introduction to Zapier automation ## Main Product Site - [DeBounce Home](https://debounce.com/): Email validation and verification service - [Email Validation API](https://debounce.com/solutions/api/): Real-time validation API documentation - [Developer API Reference](https://developers.debounce.com/): Full API docs and endpoints - [Pricing](https://debounce.com/pricing/): Credit-based pricing plans