lightning-file-upload

In plain words: The <lightning-file-upload> component is a native Salesforce LWC tool that lets users drag and drop or browse files directly from their computer into Salesforce. It automatically handles chunked file uploads, converts files into ContentVersion / ContentDocument records, and links them directly to the active record ID without requiring custom Apex upload endpoints or hitting the 6 MB synchronous heap size limit. Managing file attachments—such as customer invoices, identification proofs, contracts, and inspection photos—is a standard requirement across Salesforce implementations. Building custom binary file uploaders with Apex controllers often results in heap size exceptions when files exceed 4–5 MB. The standard <lightning-file-upload> component solves this by uploading files directly to Salesforce Files via optimized streaming APIs, supporting large uploads up to 2 GB out of the box.

In plain words: A CSV Uploader Component in LWC allows users to import spreadsheet data directly into Salesforce without navigating through standard data import wizards. The component accepts a .csv file, uploads it via Salesforce Files, and passes the generated document ID to an Apex controller that parses rows and commits new records in bulk. Importing data quickly from external systems is a standard business requirement. While administrators have access to tools like the Data Import Wizard and Data Loader, business users often need a simple, self-service interface on their home page or record view to import structured spreadsheets. Building a custom CSV import utility in Lightning Web Components gives teams immediate data creation capabilities wrapped in custom validation logic.