Configure in your codebase and get back clean, typed data your app can use.
Runs entirely in the browser, so imports feel fast and your users’ files stay off our servers.
Time until first validated record reaches your API
Make the importer feel native to your app with theme tokens, custom copy, and CSS when you need exact control.
Keep the importer config in your repo, and write validation with the same helpers and context your app already uses.
import { x } from '@expresscsv/react'; import { getEmailDomain } from '@/lib/users'; const usersImporter = x.row({+ email: x.string().email().refine((email) => {+ const domain = getEmailDomain(email);+ const allowed = workspace.allowedDomains.has(domain);+ return { valid: allowed, message: 'Domain not allowed for workspace' };+ }),+ role: x.select(['admin', 'member']), name: x.string(), });Let AI match messy column names and clean values from simple instructions before data reaches your app.
Define your schema once and get typed imported rows back in your app, with no duplicate type definitions.
const usersSchema = x.row({email: x.string().email(),role: x.select(['admin', 'member']),});open({onData: (chunk, next) => {chunk.records[0].},});emailstringrole'admin' | 'member'Private by design
ExpressCSV validates files client-side, then hands approved rows to your frontend. The raw data never touches our servers.
Pick your framework, follow the guide, and wire up imports without guessing at the right setup.
Start small, upgrade when import volume grows.
For early-stage teams
For growing businesses
For teams at scale
We'd looked at other tools but ExpressCSV felt like the modern and code-first option. Up and running in ~20 minutes and replaced our custom importer, we've never looked back.
Nick Taylor
CTO, Weldmet
We deal with sensitive customer data, so the fact that imports run entirely in the browser and never hit ExpressCSV's servers was a huge deal for us. Security review was basically a non-event.
Gonzalo Correa
Engineer, Switch
Ship fast, secure CSV imports without the hassle.