Address autocomplete
Suggests addresses in real time for checkout forms, CRMs, and web apps. Automatically handles typos, missing accents, and common abbreviations.
Type it the way you are used to
With the street type abbreviated (u., krt.), without accents, with the postal code at the end of the address. The list updates as you type; the details of the selected address appear below.
Where should we deliver?
Start typing, or click an example: · ·
How to call it · Sources and licences
Data status: Magyar Posta — dataset of 21 September 2026 · KSH Gazetteer (Helységnévtár) — 2025 edition · OpenStreetMap — extract of 16 August 2026 · GeoNames — download of 16 August 2026 · National Election Office (Nemzeti Választási Iroda) — dataset of 16 January 2026
What it does
Official settlement names with KSH code, postal codes and administrative classification.
Street, square and house number — where the source used contains them. Where it does not, the response says so.
The abbreviations “bp”, “krt” and “u.” (Budapest, körút, utca), input without accents and common typos also return matches.
A postal code typed at the end of the address narrows the matches. If no match belongs to it, we show a wider list — and say so there.
Every match says how far it got — house, street or settlement — and which sources it relies on: in the live demo on the card, in the API response in a separate field.
What it does not currently return
- Validation of floor, door, staircase and building. The search recognises flat details written after the house number (“2. em. 4. ajtó” – 2nd floor, door 4; “fszt.” – ground floor), returns them in a separate field (
sub_premise), and they do not interfere with choosing the house number — but as no public source is available, it does not validate them. - County and district (járás) in Budapest: the capital belongs to neither, so these fields are empty there. The response gives the city district (kerület), and shows Budapest streets with the same name in a separate row for each city district.
- Official certification. Adatka is not an official address register: it compares public sources and shows which of them it worked from.
Where it helps
It belongs wherever addresses are typed in. The following are ways to use it, not client references.
Online shop checkout
The customer selects their address from the list while typing
Postal code, settlement and street go into the order in a consistent spelling
It also suggests house numbers where the source contains them
Customer service, taking addresses by phone
A dictated address can be found even without accents and without the street type
The list updates as you type; there is no need to wait for the full address
If the requested house number is not in our data, the list offers the known house numbers of the street
Registration and business administration forms
The selected address also comes with a KSH code and coordinates
The coordinates come with their precision
A uniform address object as on the other endpoints
In preparation — sample layout
Measured results
Time to record one address
before: — · after: —
Share of addresses corrected afterwards
before: — · after: —
Shipments held up by a wrong address
before: — · after: —
could be here
The boxes are empty on purpose. Only a result that we have actually measured with a user goes here — with the method and period of measurement and with the user’s consent.
How to call it
A simple REST API with JSON responses. A uniform address object on every endpoint.
It can be called from any system and programming language that can send an HTTP request and read JSON — no separate library is needed.
We do not currently offer ready-made plugins for individual platforms. If you need one for your system, write to us: info@adatka.hu.
The details of the call — parameters, fields, error codes and examples — are in the API documentation. You can also view the raw response in the live demo with the “API response (JSON)” button.
→ { query, suggestions: [ { postal_code, settlement, street,
house_number, admin{…}, geo{…}, meta{…} } ] }
Access
Address autocomplete is currently available free of charge in an invitation-only beta; there is no self-service registration yet. Request access and we will contact you.
In development
- Address field by field. A ready-made form element with separate fields for the postal code, the settlement, the street and the house number; each one suggests only what fits the previous choice. The API already allows this today (step-by-step selection); the demo searches in a single field.
- Names. When a personal name is typed, it suggests the usual spelling of surnames and given names.
- Email addresses. After the @ sign, it suggests common email domains.
These features are not currently part of the live service; the exception is step-by-step selection in the API.
Other services
Postal code, KSH code and administrative data in a uniform structure.
Address validation and standardisationStandardising the address as entered, with discrepancies and uncertain parts flagged.
GeocodingCoordinates from an address, an address from coordinates — showing the level of precision reached.