Mrthdrb

How can I get a list of all available products in Magento 2?

You should use MagentoCatalogModelProductRepository or MagentoCatalogModelResourceModelProductCollection according your needs. You can use both methods to get product instances with all data.

Example 1 (Repository):

/**
 * @param MagentoCatalogModelProductRepository $productRepository
 * @param MagentoFrameworkApiSearchCriteriaInterface $criteria
 * @param MagentoFrameworkApiSearchFilterGroup $filterGroup
 * @param MagentoFrameworkApiFilterBuilder $filterBuilder
 * @param MagentoCatalogModelProductAttributeSourceStatus $productStatus
 * @param MagentoCatalogModelProductVisibility $productVisibility
 */
public function __construct(
 MagentoCatalogModelProductRepository $productRepository,
 MagentoFrameworkApiSearchCriteriaInterface $criteria,
 MagentoFrameworkApiSearchFilterGroup $filterGroup,
 MagentoFrameworkApiFilterBuilder $filterBuilder,
 MagentoCatalogModelProductAttributeSourceStatus $productStatus,
 MagentoCatalogModelProductVisibility $productVisibility
) 
 $this->productRepository = $productRepository;
 $this->searchCriteria = $criteria;
 $this->filterGroup = $filterGroup;
 $this->filterBuilder = $filterBuilder;
 $this->productStatus = $productStatus;
 $this->productVisibility = $productVisibility;

 $this->getProductData();


/**
 * @return MagentoCmsModelBlock|null
 * @throws MagentoFrameworkExceptionNoSuchEntityException
 */
protected function getProductData()


 $this->filterGroup->setFilters([
 $this->filterBuilder
 ->setField('status')
 ->setConditionType('in')
 ->setValue($this->productStatus->getVisibleStatusIds())
 ->create(),
 $this->filterBuilder
 ->setField('visibility')
 ->setConditionType('in')
 ->setValue($this->productVisibility->getVisibleInSiteIds())
 ->create(),
 ]);

 $this->searchCriteria->setFilterGroups([$this->filterGroup]);
 $products = $this->productRepository->getList($this->searchCriteria);
 $productItems = $products->getItems();

 return $productItems;

Result:

Example 2 (Collection):

/**
 * @param MagentoCatalogModelResourceModelProductCollectionFactory $productCollectionFactory
 * @param MagentoCatalogModelProductAttributeSourceStatus $productStatus
 * @param MagentoCatalogModelProductVisibility $productVisibility
 * @throws MagentoFrameworkExceptionLocalizedException
 */
public function __construct(
 MagentoCatalogModelResourceModelProductCollectionFactory $productCollectionFactory,
 MagentoCatalogModelProductAttributeSourceStatus $productStatus,
 MagentoCatalogModelProductVisibility $productVisibility
) 
 $this->productCollectionFactory = $productCollectionFactory;
 $this->productStatus = $productStatus;
 $this->productVisibility = $productVisibility;


/**
 * @return MagentoFrameworkDataObject[]
 * @throws MagentoFrameworkExceptionLocalizedException
 */
public function getProducts()

 /** @var MagentoCatalogModelResourceModelProductCollection $collection */
 $collection = $this->productCollectionFactory->create();
 $collection->joinAttribute('status', 'catalog_product/status', 'entity_id', null, 'inner');
 $collection->joinAttribute('visibility', 'catalog_product/visibility', 'entity_id', null, 'inner');
 $collection->addAttributeToFilter('status', ['in' => $this->productStatus->getVisibleStatusIds()])
 ->addAttributeToFilter('visibility', ['in' => $this->productVisibility->getVisibleInSiteIds()]);

 return $collection->getItems();

Result:

You can do this through api request. Take a look at the default m2 api

think your better shoot is catalogProductRepositoryV1

Using a REST API call:

https://host/rest/V1/products/?searchCriteria=

Retrieves all products. "searchCriteria" is a required param, but can be left blank, as above.

The most upvoted answer is working but I would like to mention that here by injecting a product repository implementation directly will cause the breach of service contract principle & that is something Magento wants developers to correct.
You should inject MagentoCatalogApiProductRepositoryInterface $productRepository instead of it's implementation which is MagentoCatalogModelProductRepository $productRepository.
That way you you will have a space for future upgrade ability. Bottom line is use Service contracts as much as possible.