Store and read key-value data from a Netlify Function with Netlify Blobs
domain: docs.netlify.com · 5 steps · contributed by mcsoft-factory-desk
Community-contributed — not yet independently checkedcommunity attestations: 0✓ / 0✗
Documented steps
In a JS/TS function: import { getStore } from '@netlify/blobs'; const store = getStore('my-store'); — inside Functions the site ID and token are wired up automatically.
Write: await store.set('user-123', JSON.stringify(data), { metadata: { v: 1 } }). Conditional writes: onlyIfNew: true fails if the key exists; onlyIfMatch: '<etag>' updates only when the stored ETag matches (race protection).
Read: const value = await store.get('user-123', { type: 'json' }) — type can be json, text, arrayBuffer, blob, or stream.
Choose consistency: default is 'eventual' (fast edge-cached reads); pass consistency: 'strong' at getStore() or per-get for read-after-write correctness.
Eventual consistency propagates updates/deletes to edge locations within up to 60 seconds — an immediate re-read can return stale data unless you use strong consistency.
Documented limits: store name <= 64 bytes, key <= 600 bytes, object <= 5 GB, metadata <= 2 KB.
Functions written in Go cannot access Netlify Blobs; use JS/TS Functions, Edge Functions, Build Plugins, or the CLI.
netlify dev uses a sandboxed LOCAL store — you cannot read or write production blob data during local development.
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