Akif Akkaya

I'm a backend-focused software engineer!

For 4+ years, I've been building backend services, shipping them to production and keeping them running.

Contact me for CV

Tools

Small things I needed often enough to build properly. Free, no sign-up, and every one of them is an API as well as a page.

JSON Formatter & Validator

Pretty-print it, minify it, find the broken bracket.

JSON to TypeScript, Pydantic & Go

Turn a response body into types you can compile.

JWT Decoder

Read the header, the claims and the expiry.

Cron Expression Explainer

What it means, and when it next fires.

Hash & HMAC Generator

MD5, SHA-1, SHA-2, SHA-3 and BLAKE2 — plus HMAC.

UUID, ULID & Nano ID Generator

v4, v7, ULID, Nano ID, ObjectId — up to 500 at once.

IBAN Validator

Checksum, length and country — 88 of them.

Mock Data Generator

Design a schema, export JSON, CSV, SQL or NDJSON.

Open

Playground

Sorting, searching, trees and graphs. Press play and watch.

Sorting Algorithms

Watch seven ways to sort an array.

Searching Algorithms

Six ways to find a value in a list.

Tree Algorithms

Walk a binary tree, node by node.

Graph Algorithms

See how a graph gets explored.

APIs

I built these and keep them running. Free, and you don't need a key.

Countries API

Flags, capitals, currencies and languages.

Random Data API

Fake names, addresses and users for testing.

Developer Tools API

JSON, JWT, cron, hashes, ids and IBAN.

Blog

Thoughts, stories and ideas

iyzico

aspnet

Integrating iyzico Checkout Form into an ASP.NET MVC Project (Step by Step)

I wrote this article because I ran into an issue while developing an e-commerce website using iyzico. At the time, I couldn’t find many resources on integrating iyzico into an ASP.NET MVC project—most explanations pointed only to the official documentation.