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What is rechnungswandler.de?

Rechnungswandler.de is an online invoicing solution specifically designed for freelancers and small businesses in Germany. This user-friendly platform allows users to convert invoice data entered through a form or extracted from various file formats, including PDF, Word, Excel, and scanned documents, into XRechnung or ZUGFeRD formats that comply with EN 16931 standards. Users can review the data extracted and download the completed invoices, while a dedicated viewer tool enables the inspection of incoming e-invoices. Since the conversion and viewing functions take place locally in the browser, the security of users' invoice files is maintained, as they are not uploaded during these processes. Premium features offered include the preservation of the original document layout, batch conversion options, storage for customer details, the use of reusable templates, the capability to send payment reminders, and the generation of validation reports. An additional AI feature is available to help recommend any missing information based on the user's input. Users have the flexibility to create new invoices through an online form or edit existing documents without the necessity of installing desktop software. There is also a free tier with limited usage, plus paid options available for 24-hour access, monthly subscriptions, or annual memberships. Ultimately, Rechnungswandler.de provides a comprehensive solution that combines convenience, security, and innovative features, enhancing the invoicing experience for its clientele, while also supporting their unique business needs.

What is Coretool?

Coretool serves as a web-based invoicing solution tailored for freelancers, sole proprietors, tradespeople, small service enterprises, and various businesses in Germany. This platform enables users to create and manage quotes and invoices while adhering to XRechnung and ZUGFeRD e-invoicing regulations, handle customer relations, send payment reminders, and organize appointments. The application also incorporates GiroCode QR codes, supports digital signatures for quotes, and allows for e-invoice document validation via its REST API. Users can enhance their workflows by connecting Coretool with automation tools such as Make, Zapier, and n8n, although access to some specialized features may require prior approval. Additionally, it supports the integration of calendar feeds with Google, Apple, or Outlook calendars. An optional Kalkulations-Assistent feature provides assistance in project estimation, material and labor calculations, and quote generation. Coretool functions entirely through a web browser, removing the necessity for local software installation. The free plan allows for the issuance of three invoices per month, while the Solo plan is priced at €9 monthly plus VAT and includes the option for monthly cancellation. The platform’s user-friendly interface further simplifies navigation through its diverse features, thereby enhancing the overall invoicing process. With its robust capabilities, Coretool aims to streamline invoicing for users and improve their financial management.

Media

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Media

No images available

Integrations Supported

n8n
DATEV

Integrations Supported

n8n
Apple Calendar
Google Calendar
Make
Microsoft Outlook
Zapier

API Availability

API Availability

Has API

Pricing Information

€2.99 one-time
Free plan: 5 conversions per day through October 31, 2026; 10 per month from November 1, 2026. The viewer remains free without a stated usage limit. Pro Pass: €2.99 once for 24 hours. Pro: €6.99/month or €59/year; subscriptions renew under their stated terms. Prices include VAT.
Free Version

Pricing Information

€0/month
The free plan includes up to 3 invoices per month. Solo costs €9/month plus applicable VAT and can be canceled monthly.
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Documentation Hub

Company Facts

Organization Name

rechnungswandler.de (Stefan Lausch)

Date Founded

2026

Company Location

Germany

Company Website

rechnungswandler.de

Company Facts

Organization Name

Coretool

Company Location

Germany

Company Website

coretool.de/en

Categories and Features

E-Invoicing

Not specified

Categories and Features

Billing and Invoicing

Not specified

E-Invoicing

Not specified

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