WeTransform alternative that never uploads the file

Updog reads the file on the user's own machine and hands your app the finished rows.

100% client-sideWhite-labelFlat $19/domain/month

Updog and WeTransform at a glance

Dimension	Updog	WeTransform
Data privacy	Files are parsed, validated, and edited in the browser. Row data never reaches Updog's servers, so there is no data processor, DPA, or residency to manage.	Files upload to WeTransform's servers and everything runs there. There is no browser-only mode. Hosting is exclusively in the European Union, encrypted in transit and at rest, with an audit trail on every import. Files and processed data are deleted after 30 days by default, configurable down to one day. The security page states GDPR compliance with ISO 27001 in progress, while a comparison page on the same site lists both SOC 2 and ISO 27001. No DPA was found, and the published privacy policy covers the website only.
White-label	Full styling through CSS variables and class overrides. No Updog logos or "powered by" on any plan, including the free one.	The branded page WeTransform serves for your organization carries your logo and colors, and the SDK passes two brand colors. The interface renders in a cross-origin frame on a WeTransform domain, so your stylesheet never reaches it. A Powered by WeTransform label appears in the homepage embed mockup.
Pricing	Free for development, and a 14-day trial with no card when you go live. In production, a flat $19 per domain per month, the same at any volume, and your first paid domain includes a free one for staging.	Public and in euros, metered by lines a month alongside AI credit pools. Standalone is €459 and cannot be embedded. Embed Core is €790 for 2 million lines and Embed Power €1,490 for 10 million, both adding webhooks, the API, and Power Functions. Enterprise is quoted. A 7-day trial with no card and no free plan.
Data mapping	Schema in code. Fuzzy column matching with a built-in synonym dictionary you can extend, or connect the AI your organization already approves through a hook, so it runs on infrastructure you control with no new AI vendor to clear. Updog keeps no mapping history. Your app owns that state and can supply saved selections on later imports. Maps incoming values to your options. Auto-detects number and date formats. Combines files by upserting on a key.	Your target format lives in a template on WeTransform's servers, built in its interface or through its API. AI reads the incoming headers and maps them to it, handling abbreviations, translations, and odd naming. AI value mapping then normalizes what is inside the fields, so a status arriving four ways lands as one value. Suggestions are reviewed before they apply, and WeTransform keeps the confirmed mapping per client and reuses it on later files.
Data cleaning	Cells edit inline through a typed editor per column, text, number, date, select, or multi-select, with clipboard, fill handle, and full undo and redo. Values pass a transform on the way in, then validation runs at three levels, built-in rules, your own checks, and asynchronous ones. Sorting, full-text search, filters on the columns you enable, and formulas. Invalid rows can block submit or come through flagged. Any view also exports in any supported format.	Autoclean runs first and rebuilds files no parser can read, PDFs and heavily formatted Excel, into a proper table. Fill the Gaps then derives missing columns from a text-rich field already in the row. Constraints validate each column and failures are reported per row, a plain-language description becomes a rule you review, and Power Functions call your own endpoint mid-import. Everything lands on a Finalize screen for review before export, which is not a general spreadsheet editor.
Scale & performance	About one million rows at around 20 columns in the browser, with a filter on every column. No fixed row cap, the browser tab's memory is the ceiling, and fewer columns reach further. Filtering and sorting run in a worker, measured at 30 to 250 milliseconds over a million rows.	Everything runs on WeTransform's servers, so the browser holds nothing and a file larger than memory is not a problem. Plans meter lines a month, 500,000 up to 10 million, with Enterprise unlimited. No per-import row limit and no file-size cap is published.
Integration	React component, plus a Web Component for Vue, Angular, Svelte, and vanilla JS. Renders inline in your page's DOM. Imports CSV, TSV, Excel, JSON, and XML, plus any other format through a parser you register yourself.	Three npm packages ship, a framework-agnostic core plus React and Vue 3 wrappers, and the interface renders in a cross-origin iframe, as a modal or inline. Your backend has to sign an HMAC token before it will render. Reads CSV, TXT, Excel, JSON, XML, PDF, and images.
Languages & RTL	English by default, with every interface string overridable, so you can localize into any language. Right-to-left is first-class. It flips layout, text alignment, scrollbars, and column pinning, and carries through to export.	Two interface languages, English and French, set at init and switchable at runtime. No other locale and no way to supply your own strings was found, and no right-to-left support was found.
Accessibility	An ARIA grid with full keyboard navigation and screen-reader support. WCAG 2.2 AA is the level Updog builds to, with automated rule checks over every component and every step of the importer on each test run. Updog holds no independent audit or VPAT.	The modal the SDK mounts in your page is a labelled dialog with a focus trap and the rest of the page made inert. The interface inside is a cross-origin frame, so its markup cannot be audited from outside. No accessibility statement or WCAG claim was found.

WeTransform is a Belgian platform sold as a hosted Workspace, an embedded SDK, and scheduled Workflows; this page compares the embedded SDK, the closest match to Updog. Facts checked against WeTransform's public pages in August 2026.

Which one fits your team

WeTransform may fit better if

You need to import PDFs and Excel exports that are not really tables.
You want the same partner file collected and processed every week on its own, from FTP, SFTP, an email address, or your API.
You want the vendor to keep the confirmed mapping for each client and apply it to every later file.
You need EU-only hosting, a retention window you set yourself, and an audit trail on every import.

Updog may fit better if

You want an importer and spreadsheet editor embedded in your own app.
You want to match your app's design exactly, styling the editor with your own CSS through variables and class overrides.
You want to handle large files in the browser, with nothing stored on a server.
You want flat, public pricing with no per-import fees.
You want to use the AI your organization already approves, with no new vendor to clear.

Questions people ask

Is Updog a drop-in replacement for WeTransform?

No. Updog renders in your page and hands your app the finished rows in memory. WeTransform renders its own interface in a cross-origin frame, does the work on its servers, and returns a signed link to the transformed file for your backend to fetch.

How do the two handle data privacy?

Updog has no server mode, so row data never leaves the browser. WeTransform uploads the file and processes it on its servers, hosted only in the European Union, keeping files and processed data for 30 days by default, configurable down to one day.

How does Updog pricing compare?

Updog is a flat $19 per production domain per month, free in development. WeTransform starts at €459 a month for its standalone app and €790 for the cheapest plan you can embed.

Can Updog handle large files like WeTransform?

Yes, about 1 million rows in the browser, bound by the machine's memory. WeTransform runs on its servers instead, so the ceiling is its monthly line allowance, up to 10 million on Embed Power and unlimited on Enterprise.

Does either one need a backend?

Updog needs none, on any plan. WeTransform does. Your server has to sign an HMAC token before the embed will render, and it has to verify the signature on the result before fetching the file.

Does Updog have built-in AI mapping like WeTransform?

No. Updog uses fuzzy matching with a synonym dictionary you can extend, and can call an AI endpoint you control. WeTransform runs AI column mapping and AI value mapping on its own servers, and keeps the confirmed mapping for later files.

Can Updog be used to view or edit existing data, without an import?

Yes. Load existing data straight into Updog's editor to view and edit it, with a read-only mode. WeTransform can open a read-only preview of a source it already holds, and its editing happens inside an import.

How do the two handle accessibility?

Updog's grid uses ARIA semantics with full keyboard navigation and screen-reader support, and the importer is checked against WCAG 2.2 A and AA rules on each test run. Updog holds no independent audit or VPAT. The modal WeTransform's SDK mounts in your page is a labelled dialog with a focus trap, while the interface inside it is a cross-origin frame that cannot be audited, and no accessibility statement was found.

Can the interface be translated, and does right-to-left work?

Updog ships in English with every interface string overridable, so you can localize into any language, and it renders right-to-left layouts natively. WeTransform has two interface languages, English and French, switchable at runtime, and no right-to-left support was found.

Try Updog for free

Install the package, add your columns, render the component. Free on localhost and preview domains. Every feature included.