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Average Ratings 0 Ratings

Total
ease
features
design
support

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Write a Review

Description

Coretool is an online invoicing platform designed specifically for freelancers, sole traders, tradespeople, small service businesses, and other enterprises in Germany. With this application, users can generate and oversee quotes and invoices, including compliance with XRechnung and ZUGFeRD e-invoicing standards, manage customer relationships, issue payment reminders, and schedule appointments. The software integrates GiroCode QR codes, facilitates digital signatures for quotes, and enables e-invoice document validation through its REST API. By utilizing API-based workflows, users can link Coretool with automation platforms like Make, Zapier, and n8n, though access to certain specialized modules may require approval. Additionally, it allows users to incorporate calendar feeds into Google, Apple, or Outlook calendars. An optional Kalkulations-Assistent feature aids in estimating projects, calculating materials and labor, and producing quotes. Coretool operates entirely within a web browser, eliminating the need for any local software installation. The free plan permits the issuance of three invoices each month, while the Solo plan is available for €9 per month plus VAT and offers the flexibility of monthly cancellation. Furthermore, the intuitive interface makes it easy for users to navigate through the various functionalities and enhance their invoicing experience.

Description

Rechnungswandler.de serves as an online e-invoicing solution tailored for freelancers and small enterprises in Germany. This platform facilitates the transformation of invoice data input through a form or extracted from various file types, such as PDF, Word, Excel, and scanned documents, into compliant XRechnung or ZUGFeRD formats based on EN 16931 standards. Users have the ability to review the extracted data and download the finalized invoice, while a viewer tool allows for the examination of incoming e-invoices. Since both the conversion and viewing processes occur locally within the browser, users' invoice files remain secure and are not uploaded during these tasks. The platform offers premium features that include the preservation of the original document layout, the capability for batch conversions, storing customer information, utilizing reusable templates, sending payment reminders, and generating validation reports. Additionally, an optional AI feature can assist by recommending any missing information. Users have the flexibility to create new invoices via the web form or modify existing documents, all without the need for desktop software installation. A free tier with certain usage restrictions is available, alongside paid plans that can be purchased for 24-hour access, monthly subscriptions, or annual memberships. Overall, Rechnungswandler.de combines convenience, security, and advanced features to streamline the invoicing process for its users.

API Access

Has API Yes 

API Access

Has API No 

Screenshots View All

No images available

Screenshots View All

No images available

Integrations

n8n Yes 
Apple Calendar Yes 
DATEV No 
Google Calendar Yes 
Make Yes 
Microsoft Outlook Yes 
Zapier Yes 

Integrations

n8n Yes 
Apple Calendar No 
DATEV Yes 
Google Calendar No 
Make No 
Microsoft Outlook No 
Zapier No 

Pricing Details

€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 Trial No 
Free Version Yes 

Pricing Details

€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 Trial No 
Free Version Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Coretool

Country

Germany

Website

coretool.de/en

Vendor Details

Company Name

rechnungswandler.de (Stefan Lausch)

Founded

2026

Country

Germany

Website

rechnungswandler.de

Product Features

Billing and Invoicing

Billing Portal No 
Contact Database No 
Contingency Billing No 
Customer Portal No 
Customizable Invoices No 
Dunning Management No 
Hourly Billing No 
Invoice History No 
Mobile Payments No 
Multi-Currency No 
Online Invoicing No 
Online Payments No 
Payment Processing No 
Project Billing No 
Recurring/Subscription Billing No 
Service Ticket Billing No 
Tax Calculator No 

Product Features

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