Professional invoicing software for freelancers and small businesses.
For Small Businesses, Freelancers & Growing Companies
Join the beta waiting list to get notified when downloads become available.
JamInvoice is tailored for individuals and businesses who value simplicity, speed, and absolute ownership of their financial records.
Track consultants, writers, developers, designers, and creatives invoicing clients globally.
Sole traders, practitioners, and independent operators running solo businesses.
Plumbers, electricians, builders, and technicians who need professional quotes and estimates on-site.
Local shops, service providers, and startups managing business invoicing without expensive overhead.
Project contractors, engineers, and builders billing regularly on defined contract terms.
Advisors, strategists, and experts seeking quick, professional invoicing and client estimates.
No databases on external servers, no cloud subscriptions, and no tracking. Just professional tools.
All client records, finances, and invoices are saved securely on your device's local sandbox storage. Complete privacy and GDPR compliance out of the box.
Create and manage unlimited clients, generate infinite PDF invoices and estimates. No paywalls, subscription models, or unexpected usage fees.
Sync PC, phone, and tablet without database servers. Just set a shared sync folder (e.g. Google Drive, OneDrive, or Dropbox) and let JamInvoice auto-merge changes safely.
Generate premium, high-quality PDFs for print or email in seconds. Supports tax calculations, custom company logos, signatures, and localized currency options.
Synchronize invoices, customers and company data between Windows PCs and mobile devices using Dropbox, OneDrive or any shared folder — no server needed.
All data is saved securely in your device's local sandbox storage. Additionally, a safety-net auto-backup file named jaminvoice_autobackup.json is saved automatically in your local Documents folder every time you make changes.
Simply select the same sync directory (e.g., a shared folder inside your OneDrive, Google Drive, or Dropbox client) in the app settings on all your devices. JamInvoice detects new updates and merges them on startup without sending data to any third-party servers.
No need to worry. JamInvoice's auto-recovery system will automatically scan your user Documents folder on startup, find jaminvoice_autobackup.json, and restore all your invoices and company data instantly.
No, JamInvoice operates 100% offline. An internet connection is only needed when your third-party cloud client (such as OneDrive or Google Drive) syncs files in the background to other devices.
Built for reliability, privacy, and speed. We believe in software that belongs to you, not a subscription service.
Run entirely on your device. Zero dependency on cloud databases or external hosting services.
Your client data never leaves your device. Built-in compliance with zero data privacy worries.
Buy once or use free. No recurring fees, surprise charges, or hidden paywalls.
Grow your business without limits. Add as many company and client contacts as you need.
Create, manage, and download infinite invoices and estimates at no extra cost.
Generate highly-polished invoice PDFs styled instantly with your logo, fonts, and taxes.
Follow our development progress as we build the ultimate offline-first invoicing ecosystem.
JamInvoice started from a simple idea: Small businesses shouldn't need expensive subscriptions just to create professional invoices.
We're building a fast, offline-first solution that gives users full control over their data, keeping your financial records exactly where they belong—on your own hardware.
JamInvoice operates 100% offline. Sign up below to get early access to our beta sync features, and be notified the moment the Windows, Android, and Apple (iOS & macOS) versions go live.
Have questions, feedback, or need support? Reach out to the appropriate department below.
JamInvoice is a product of J.A.M. Globe Ltd
