16 generators245 countriesruns in your browsernothing is stored
Test data that passes validation.
Phone numbers libphonenumber accepts, card numbers that pass Luhn, barcodes with the right check digit. Pick a generator and copy the output — no account, no upload, no limits.
+1 202 555 0182People, places and contacts
Fill a form, seed a database, populate a demo.
6- Phone GeneratorValid mobile and landline numbers for 245 countries, checked against the same libphonenumber-js metadata your code validates with.✓ E.164+1 202 555 0182
- User GeneratorWhole profiles — name, email, phone, address and date of birth — consistent with one another instead of drawn from separate hats.Marta Nowak · 1991-04-18
- Address GeneratorStreet, city, region and postal code in the format each country actually uses — not one template with the names swapped.12 Rue de Rivoli, 75004 Paris
- Email GeneratorAddresses in Gmail-style, corporate and disposable shapes, with plus-addressing and dotted variants for testing filters.m.nowak+test@example.dev
- Username GeneratorHandles by pattern — word pairs, leetspeak, numbered suffixes — with length limits and a check that they stay readable.swift_falcon_84
- Company GeneratorFictional companies whose industry, legal form, headcount and revenue fit together instead of contradicting each other.Nordwind Logistik GmbH
Secrets and identifiers
Everything here comes from the Web Crypto API.
2Payments and crypto
Test values only — none of it is issued to an account.
3- Payment StudioTest cards for 15 networks, a validator, a BIN lookup and bulk export in six formats.✓ Luhn4539 1488 0343 6467
- Credit Card GeneratorThe single-purpose card generator, for when the whole studio is more than you need. Numbers pass Luhn and match a real BIN range.✓ Luhn5425 2334 3010 9903
- Crypto Wallet PlaygroundAddresses, BIP39 mnemonics and HD derivation trees for 22 blockchains, plus a validator. For testing — never for real funds.✓ bech32bc1q…kgdygjrsqtzq2n0yrf
Codes and barcodes
Rendered as SVG, so they stay sharp at any size.
2Design and media
Heavier tools — they still run entirely on your machine.
3- Color StudioPalettes, gradients, converters and WCAG contrast checks, exported as CSS, Tailwind or design tokens.#3ECF8E → oklch(.77 .14 158)
- Image StudioBackground removal, upscaling and format conversion, with a brush for touching up the mask by hand.✓ alphaportrait.jpg → cutout.png
- Media StudioConvert, compress and trim video with FFmpeg compiled to WebAssembly. Nothing is uploaded.mp4 → webm · −72%
In the works7 planned
- IBAN Generator
- JSON Generator
- License Plate Generator
- Lorem Ipsum Generator
- Mock API Generator
- Text Generator
- Vehicle Generator
Not built yet, so they are not in the catalogue above — every card there opens something.
client-side
Your data never leaves the tab
Every generator runs in the browser. Nothing is uploaded, logged or stored — which is also why there is no account to create.
libphonenumber · Luhn · BIP39
Valid, not just plausible
Output is built against the same standards your code checks it with, so it survives the validator instead of failing at the first form.
json · csv · sql · xml
In the shape you need it
Copy one value or export a thousand rows. Seeded generation repeats the same set, so a failing test stays reproducible.
Frequently asked
Is it free?
Yes, all of it, with no sign-up and no daily limit. The generators run on your machine, so there is nothing for us to meter.
Are the phone numbers real?
They are structurally valid and unassigned. Numbers are built from Google's libphonenumber metadata, so they pass validation for the country you pick without belonging to anyone.
Can I pay with the card numbers?
No. They pass the Luhn check and match a network's BIN range, which is what a checkout form validates — but they are not issued to an account and will be declined.
Do you store what I generate?
No. Generation happens in your browser and nothing is sent to a server. History, where a tool keeps one, lives in that browser only.
Can I get the same values twice?
Yes — give the generator a seed and it returns the same set every time, so a fixture stays stable and a failing test can be reproduced.
Start with the one you came for
Phone numbers for 245 countries is where most people begin.
Open the Phone Generator