randumb — coherent fake data form filler

Form filler with 58 locales and country-coherent identities (Germany→Hans Müller→München→€). Bulk CSV for test DBs. Free.

As of June 2026, randumb — coherent fake data form filler has 2 users in the Developer Tools category.

Usersno change0%
2
2
Ratingno change0%
— reviews
Reviewsno change0%
Version
1.0.3
Manifest V3

History

2 snapshots

Tracking since May 4, 2026.

Not enough history yet for this metric — the chart fills in as we collect more snapshots.
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DateUsersRatingReviewsVersion
May 4, 20261.0.3
Jun 3, 20261.0.3
Now21.0.3

Permissions & access

Permissions
storagealarmscontextMenusdownloadsactiveTabscripting
Host access
<all_urls>

Screenshots

randumb — coherent fake data form filler screenshot 1randumb — coherent fake data form filler screenshot 2randumb — coherent fake data form filler screenshot 3randumb — coherent fake data form filler screenshot 4

About

randumb is a form-filler for developers, QA engineers, and product
testers. Press Alt+Shift+F (or click the floating "r̸ fill form" badge)
and every fillable field on the page gets a coherent fake identity:
matching first name, last name, email, phone, street, city, postal
code, and currency — all from the same country.

The difference from every other form filler: coherence. Most tools pick
each field independently and produce things like "Germany, John Smith,
Tokyo, $12.50". randumb picks a country first, then draws everything
from that country's dictionary. You get "Deutschland, Hans Müller,
München, €7.423,00" — the kind of data your localization tests expect.

WHAT IT FILLS

  • full name / first name / last name / middle name
  • email (with realistic provider per country — gmx.de for Germany,
    libero.it for Italy, gmail.com for the US, etc.)
  • phone with country-correct format
  • street / city / region / postal code
  • company name / job title
  • username / password (passes basic complexity)
  • birthdate in a reasonable adult range
  • Luhn-valid test credit card numbers (structurally valid, never real
    stolen numbers)
  • 30+ other field kinds, detected from field name, id, label,
    placeholder, and autocomplete attribute

HOW IT DETECTS FIELDS

Every input is scored against a token table with weights for:

  • input type (email, tel, password)
  • HTML5 autocomplete attribute (given-name, street-address, …)
  • name / id / placeholder / label / aria-label tokens

Fields the classifier is confident about get the matching generator;
fields it isn't get a generic string. All fills go through a native-
setter + input/change/blur event dispatch so React/Vue/Angular forms
correctly pick up the change.

LOCALES

Free: 15 locales — US, UK, DE, FR, ES, IT, PT, PL, TR, NL, SE, NO,
DK, FI, JP.

Pro adds 43 more, including Israel, UAE, Saudi Arabia, India, China,
Korea, Indonesia, Vietnam, Thailand, Brazil, Argentina, Mexico, and
31 others. Each locale has its own first-name / last-name dictionary,
currency, phone format, and city list.

PRO — $4.99/mo

  • All 58 locales
  • Bulk CSV export (up to 1,000 rows per click — great for seeding
    test databases)
  • Seeded mode: same seed → same output (reproducible fixtures)
  • Per-domain presets: signup.acme.com always fills US, dev.myapp.local
    always fills DE
  • Custom field mappings: force field "user_code" to always fill as
    an email, for example

Team ($9/seat) and Enterprise ($49 flat) at voiddo.com/tools/randumb/upgrade.

PRIVACY

randumb writes generated data INTO fields on the page you triggered
it on. It does not read what was there before, does not transmit form
values anywhere, does not inspect pages you didn't invoke it on. The
only outbound request is license validation (only if you've entered a
Pro key), at activation and once per 24h.

Full policy: https://voiddo.com/tools/randumb/privacy/

Technical

Version
1.0.3
Manifest
V3
Size
125KiB
Min Chrome
110
Languages
1
Featured
No

Metadata

ID
icmabahlbfcecgnjlilingppfagohcil
Developer ID
uc71b977faa88e76ffe193279628a4849
Developer Email
[email protected]
Created
May 3, 2026
Last Updated (Store)
May 3, 2026
Last Scraped
Jun 9, 2026
Website
voiddo.com
Support URL

Data sourced from the Chrome Web Store · last verified Jun 9, 2026.