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Format.im

Free online tool for professional invoice number generation

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Collected: 2025/9/13

What is Format.im? Complete Overview

Format.im is a specialized online tool designed to generate professional invoice numbers efficiently. It caters to businesses of all sizes, freelancers, and accounting professionals who need to create structured, unique, and compliant invoice numbering sequences. The tool solves key pain points around invoice management, including ensuring number uniqueness, maintaining proper sequencing, and accommodating various business-specific formats. With support for sequential, random, and custom-formatted numbers, Format.im eliminates the hassle of manual invoice numbering while reducing errors. The platform also provides integration capabilities with popular accounting software and programming languages, making it versatile for both standalone use and system integration scenarios.

Format.im Interface & Screenshots

Format.im Format.im Interface & Screenshots

Format.im Official screenshot of the tool interface

What Can Format.im Do? Key Features

Custom Number Formatting

Create invoice numbers in any format you need, including year prefixes (2024-001), client codes (CLI001-001), department identifiers (SALES-001), or date-based formats (20240121-001). Supports custom separators like hyphens, slashes, dots, or underscores, with up to 50 characters per number.

Multi-sequence Management

Generate and maintain separate numbering sequences for different invoice types (regular, proforma, quotations) or business units. Each sequence can have its own unique prefix, counter, and formatting rules, allowing for complete organizational control.

Bulk Generation

Produce up to 1,000 invoice numbers in a single batch, with options for sequential or random numbering. This feature is particularly useful for businesses needing to prepare large sets of invoice numbers in advance for system implementation or migration.

Financial Year Handling

Automatically reset numbering sequences at fiscal year transitions with specialized formatting options (e.g., FY24-001). The tool can accommodate different fiscal calendars and maintain separate counters for each financial period.

Integration Support

Comes with ready-to-use code examples for integrating generated formats with PHP, Python (including Django), and popular accounting software. Includes implementation guides for database storage, retrieval, and validation of invoice numbers in various systems.

Best Format.im Use Cases & Applications

Small Business Invoicing

A freelance graphic designer uses Format.im to create client-specific invoice numbers (CLIENTCODE-YEAR-001) that automatically increment with each new project. This professional numbering helps with record-keeping and appears more credible to clients.

Enterprise Accounting System Migration

During a software transition, a manufacturing company generates 500 sequential invoice numbers with department prefixes (PROD-, SALES-, ADMIN-) to maintain continuity while implementing their new ERP system.

E-commerce Platform Integration

An online retailer implements Format.im's PHP code examples to automatically generate unique order numbers (STORE-YYYYMMDD-001) directly in their shopping cart system, ensuring no duplicate orders.

How to Use Format.im: Step-by-Step Guide

1

Select your numbering pattern: Choose from pre-defined templates or create a custom format using the intuitive interface. Specify prefixes, suffixes, separators, and number length according to your business requirements.

2

Configure sequence options: Set whether you want sequential or random numbering, define the starting number, and specify any fiscal year or reset parameters needed for your accounting practices.

3

Generate numbers: Click to create your invoice numbers. The tool will immediately display a preview of your sequence, showing several examples of how the numbers will appear when used.

4

Export or implement: Download your numbers in Excel format, copy them to clipboard, or use the provided code snippets to integrate them directly into your accounting system or custom application.

Format.im Pros and Cons: Honest Review

Pros

Completely free to use with no hidden costs or limitations
Extremely flexible formatting options accommodate virtually any business requirement
Helps maintain professional, consistent invoice numbering standards
Reduces accounting errors through automatic sequencing and uniqueness verification
Saves significant time compared to manual invoice number creation

Considerations

Free version has a batch limit of 1,000 numbers (though multiple batches can be created)
No native mobile app version currently available
Advanced integration features require some technical knowledge to implement

Is Format.im Worth It? FAQ & Reviews

Yes, our tool supports random invoice number generation while ensuring uniqueness. This is particularly useful for situations where sequential numbering isn't desired or required.

We provide ready-to-use PHP code examples that demonstrate how to implement the numbering patterns generated by our tool, including database storage and retrieval methods.

Our generator supports invoice numbers up to 50 characters total, including all prefixes and suffixes, though we recommend keeping them under 20 characters for practicality.

Absolutely. You can create distinct numbering sequences for different business units by using unique prefixes or identifiers in your format.

Our date-based formatting options allow automatic reset of numbering sequences at fiscal year transitions, with customizable prefixes like FY24-001.

How Much Does Format.im Cost? Pricing & Plans

Free

$0
Basic number generation
Up to 1,000 numbers per batch
Standard formats
Excel export
Basic code snippets

Format.im Support & Contact Information

Last Updated: 9/13/2025
Data Overview

Monthly Visits (Last 3 Months)

2025-07
532
2025-08
1869
2025-09
3949

Growth Analysis

Growth Volume
+2.1K
Growth Rate
111.23%
User Behavior Data
Monthly Visits
3949
Bounce Rate
0.4%
Visit Depth
1.1
Stay Time
0m
Domain Information
Domainformat.im
Traffic Source Distribution
Search
61.0%
Direct
24.2%
Referrals
8.3%
Social
4.8%
Paid
0.9%
Geographic Distribution (Top 5)
#1IN
39.6%
#2US
37.1%
#3GB
23.3%
#4-
-
#5-
-
Top Search Keywords (Top 5)
1
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1.3K
2
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100
3
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60
4
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10
5
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220