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devfiller

Stop typing test data.

DevFiller fills the form you're testing with realistic, fictional data in one click. It never submits anything, and it works without an account.

Install DevFillerRead the docs

Free for Chrome. Recognizes English, French and Arabic labels.

Create your account

Runs the same generator as the extension, right here in your browser.

What it fills, and what it leaves alone

42 field types, matched by label, name, placeholder or autocomplete. Values fit together: the username and email follow the generated name.

Filled for you

Identity
Names, usernames, date of birth, age, gender, nationality
Contact
Emails at example.com, fictional phone numbers, websites
Work
Company, job title, department, industry, team size
Address
Street, apartment, city, state or wilaya, postal code, country
Numbers and dates
Quantities, prices, ratings, dates, times, colors, all within the field's limits
Text
Readable words and short sentences, never random strings

Left for you to handle

  • Passwords, unless you turn test passwords on
  • Payment card fields and one-time codes
  • Consent, terms and newsletter checkboxes
  • File uploads, hidden, disabled and read-only fields
  • Search boxes and navigation controls
  • Any field you exclude, on every site or just one

See every field beside the page

Open the side panel with Alt+Shift+F. It follows the tab you're on and shows exactly what happened.

Every field, with a reason
Filled, skipped, or incompatible, and why.
Fix one field
Save a custom value or exclude a field for this website.
Undo last fill
Restore the previous values, keeping anything you edited since.
A filled form with the DevFiller side panel listing 17 filled and 3 skipped fields

Nothing leaves your browser unless you turn on AI

Settings stay in local extension storage. There is no DevFiller server, account or analytics, and the values you type are never sent anywhere.

If you add your own Groq or Gemini key, only field descriptions (labels, names, placeholders and limits) go to that provider, to suggest values for unusual fields.

Read the privacy policy

Roadmap

The extension is the first step. Next, the same engine as a package you install in your test suite.

  1. Chrome extension 1.0

    Available

    One-click filling, the side panel with undo, custom values, exclusions, English, French and Arabic, and optional AI with your own key. The Chrome Web Store listing is on its way; until then, install it from GitHub.

    Install it

  2. devfiller on npm

    In design

    The same field detection and data generator as a dev dependency, so your Playwright, Cypress and Vitest suites fill forms with realistic data instead of hard-coded strings.

    Read the draft

  3. Edge and Firefox

    Planned

    Store releases for Microsoft Edge and Firefox, once each browser is tested end to end.

  4. Repeatable and custom data

    Planned

    Seeded fills that produce the same data every run, custom generators for patterns, UUIDs and ranges, and support for frames, shadow DOM and custom dropdowns.