Tools, calculators and generators

Practical calculators for frontend work, Shopware and performance marketing. The tools provide fast orientation for first decisions.

PX EM Calculator Use this calculator to convert pixels to EM and EM back to pixels. The default base is 16 pixels, which matches many common CSS setups. Open detail page
Shopware 6 Major Update Calculator The Shopware 6 major update calculator gives you a first estimate for time and budget when planning a larger Shopware update. Open detail page
Google Ads ACoS / ROAS / Cost Ratio Calculator Use this Google Ads ACoS, ROAS and cost ratio calculator to understand which CPC can work for your conversion rate and average order value. Open detail page
UTM Parameter Generator Build clean tracking URLs with UTM parameters, copy them in one click, and store recurring setups as local presets. Includes suggestions for campaign names, media labe... Open detail page
SEO meta and SERP preview Review meta titles and descriptions with character counters. Below the form, two cards show how the title, URL line and description wrap at typical desktop (600 px) an... Open detail page
HEX RGB HSL Color Converter Convert colors between HEX, RGB, RGBA, HSL, and hsla. Each field acts as both input and output: edit HEX, paste rgb() syntax, tweak H/S/L as numbers and every parallel... Open detail page

Clients Who Trust Us

Sportstech Flower24 CSR Automotive
av-multi Organicbabyfood24 Resotex brickNbricks Elements Thai Spa RS Original Carsupply Krins Home Othmerding Funkelkram Kaderverband Most Wanted Pens Taschen aus Segeltuch Almig Meysen Teppiche Salamander Verlag Keitoya Markiso Dr. Wunder Klangstudio Teamania

The People Behind HosonoDE

Our team brings together e-commerce, development, marketing and operations from Tokyo. Short paths, clear communication and a shared focus on sustainable growth.

Ryusei - HosonoDE
Tokio
Ryusei

CEO & Gründer

Tamiko - HosonoDE
Tokio
Tamiko

Backoffice

Hayato - HosonoDE
Tokio
Hayato

Backoffice

Menghsin - HosonoDE
Tokio
Menghsin

Backoffice

Monicque - HosonoDE
Tokio
Monicque

E-Commerce

Marco - HosonoDE
Tokio
Marco

Development

Adrian - HosonoDE
Tokio
Adrian

Marketing

Vladimir - HosonoDE
Tokio
Vladimir

Development

Pedro - HosonoDE
Tokio
Pedro

Development

Pedar - HosonoDE
Tokio
Pedar

E-Commerce

Ricarda - HosonoDE
Tokio
Ricarda

Marketing

Peter - HosonoDE
Tokio
Peter

E-Commerce

Aletta - HosonoDE
Tokio
Aletta

Marketing

IRIS AI - HosonoDE
Tokio
IRIS AI

AI

Ryusei Hosono, CEO of HosonoDE

Ryusei Hosono

CEO & Founder

If you have any questions, I am happy to help!

I am Ryusei, managing director at HosonoDE. For 10 years I have worked with online shops and digital marketing. Email me anytime ([email protected]), or use WhatsApp or Microsoft Teams.

[email protected]
WhatsApp
Microsoft Teams
+81 42-7183-067
Send email Message on WhatsApp Call now

Questions about our tools

Short notes on usage and interpretation.

No. The calculators provide orientation. For binding offers or campaign decisions, we always review the concrete setup.

Yes, as a starting point. Especially for updates and ads, buffers, technical risks and margins should also be checked.

Yes. Each tool has its own Twig folder, so new logic and interfaces can be added cleanly.

Yes. If the calculation turns into a project, we can review shop, tracking, plugins or campaign structure together.

Free tools for e-commerce, ads and development

Our tools turn recurring calculations from agency work into simple interfaces. They do not replace individual analysis, but they help you classify initial values quickly.

If you need support after a calculation, we can turn the numbers into a concrete technical or marketing plan.