Free Test Files at the Exact Size You Need.
Generate real PDF, Word, Excel, PNG, JPG, WebP and other test files at the exact size or dimensions you need. Download a file instantly or use a stable URL in your test suite.
Get the Test File You Actually Need
Testing an upload should not start with searching for a file that is “roughly 10 MB.”
Testfilelab generates the test file you need in the format and size you choose. Set an exact file size in bytes or choose precise image dimensions, and get a ready-to-use file in seconds.
Every generated document is a real file that can be opened by the software it was created for. Images are generated at the exact pixel dimensions you request.
There is no account to create, no watermark to remove and no real customer data involved.
Why Most Test Files Let You Down
A test file needs to behave like the kind of file your application will receive in production.
Fake files
A renamed text file may have a .pdf extension, but it is not a real PDF. MIME validation can reject it immediately.
Approximate sizes
A file described as “about 10 MB” is also not enough when your application has an exact upload limit. For boundary testing, you may need exactly 10,485,760 bytes.
Real customer data
Using real customer documents creates another problem. Test environments should not depend on personal or sensitive data simply to validate an upload.
Local-only files
And when test files exist only on a developer's machine, automated tests and CI pipelines can break when those files are moved or deleted.
Testfilelab solves these problems with real, predictable test files generated to exact specifications.
Exact, Valid Files Generated on Demand
Choose the format and size you need. Testfilelab generates a genuine file with the correct internal structure and adjusts it to the requested target size.
Exact File Sizes
Generate documents from 1 KB to 100 MB using binary units.
This makes it easier to test upload limits and validation rules using the same units commonly used by application frameworks.
Real File Structures
PDF, DOCX and XLSX files are generated as actual documents rather than files with renamed extensions.
- MIME type validation
- File parsing
- Upload handling
- Document previews
- Conversion workflows
- File processing logic
Precise Image Dimensions
Generate PNG, JPG, WebP and GIF images at specific dimensions.
Create anything from a 1×1 pixel image to 5000×5000 pixels, with the background colour you need.
Stable Test File URLs
Need the same file inside a script or CI pipeline?
Each generated file can be accessed through a predictable URL, making it easy to use with tools such as curl, wget and automated test runners.
# Exactly 10 MB, every time
curl -L -o test-10mb.pdf \
"https://www.testfilelab.com/docs/generate/pdf/10mb?download=1"
wget -O banner.png \
"https://www.testfilelab.com/image/generate/png/1200x630?download=1"Built for Upload, Validation and CI Testing
Testfilelab is designed around the situations where developers need predictable test files most.
Test Upload Limits
Create files just below, exactly at or just above your application's upload limit.
This makes boundary testing much easier.
Test File Validation
Check whether your application correctly accepts supported formats and rejects files with invalid types or sizes.
Test API File Endpoints
Use real files in multipart/form-data requests and verify:
- Response status codes
- MIME detection
- Validation errors
- API error responses
- File processing
Test Image Pipelines
Generate images with exact dimensions and aspect ratios for testing:
- Thumbnails
- Image resizing
- Cropping
- Image optimisation
- Media processing
Test Document Processing
Use real PDF, DOCX and XLSX files when testing:
- Document parsers
- File previews
- Converters
- Upload processors
- Document management systems
Build Demos and Designs
Use correctly sized placeholder files in:
- Wireframes
- CMS libraries
- Product demos
- Upload interfaces
- Design prototypes
Generate the Format Your Test Requires
Testfilelab supports common document and image formats for different testing scenarios.
Image Test Files.
Choose the exact dimensions required for your test. Whether you need a 1200x630 PNG, a 1920x1080 JPG or a custom image size, you can generate it without creating the file yourself.
Browse Images →How Testfilelab Works
Getting a test file takes three simple steps.
Choose the document or image format required for your test.
Select a preset such as 10 MB or 1200x630, or enter your own size or dimensions.
Download the generated file directly.
Popular Test Files
Start with commonly used test files or generate your own custom file.
Popular Document Sizes
Useful for testing XML uploads, parsing and validation.
18 downloads Get file →Useful for testing Markdown uploads, parsing and previews.
15 downloads Get file →Useful for testing legacy Word document uploads and conversions.
14 downloads Get file →A practical choice for testing common upload-size limits.
13 downloads Get file →Popular Image Dimensions
Useful for application icons and square image testing.
26 downloads Get file →Useful for application icons and square image testing.
8 downloads Get file →Useful for application icons and square image testing.
8 downloads Get file →Useful for application icons and square image testing.
7 downloads Get file →What You Can Rely On
Test files are useful only when you can trust what they contain and how they behave.
Files Are What They Say They Are
PDF, DOCX and XLSX files use real document structures. Image files are genuine PNG, JPEG, WebP or GIF files with the requested dimensions.
Sizes Are Exact
Generated document files are created to the requested byte size using binary units.
Each generated file can be checked against its exact byte count.
No Personal Data
Testfilelab does not require you to upload a real document.
Generated files use filler content and placeholders, making them suitable for development, testing and sharing.
No Signup Required
Generate and download files without creating an account or removing a watermark.
Files can be used for both personal and commercial purposes without attribution.
Clear Limits
Document files can be generated up to 100 MB.
Images can be generated up to 5000×5000 pixels.
Important: .doc generation currently uses RTF content. Tools that inspect the internal content may identify it as RTF.
Why Use Testfilelab?
Testfilelab focuses on one simple problem: giving developers and teams the exact files they need for testing.
Instead of creating files manually, searching for random samples or using real customer documents, you can generate predictable test files on demand.
That means less time preparing test data and more time testing the application itself.
- Exact sizes.
- Real file structures.
- Predictable URLs.
- No signup.
What Can You Use Testfilelab For?
Testfilelab gives you sample files for testing across uploads, validation, APIs, images, documents, CMS platforms, storage systems, and product demos. Choose the format and size you need, then use the generated file in your application, test suite, design, or workflow.
Test File Upload Limits
Test minimum and maximum upload sizes, boundary values, server restrictions and oversized-file errors using exact-size test files and practical examples for developers and QA engineers.
Read the guide →Test Image Uploads
Test how your application handles images with different file sizes, dimensions, formats, and aspect ratios. Use predictable test images to check upload validation, thumbnails, resizing, cropping, previews, and image processing workflows.
Read the guide →Test PDF and Document Processing
Learn how to test document parsing, PDF previews, text extraction, conversions, large files and processing timeouts using real test documents.
Read the guide →Test CMS Media Uploads
Test how your content management system handles media uploads, from file validation to previews and media library management. Use controlled test files to check supported formats, image dimensions, upload limits and larger media libraries without relying on real customer assets.
Read the guide →Test API File Handling
Test file upload endpoints with valid and invalid files, verify multipart requests and confirm that your API handles errors correctly.
Read the guide →Test File Validation Rules
Check whether your application accepts valid files, rejects invalid uploads and verifies file content instead of trusting extensions alone.
Read the guide →Test Storage and CDN Integrations
Learn how to test file storage, cloud delivery, storage limits and CDN behavior. Explore scenarios relevant to applications that upload and serve files through cloud storage systems.
Read the guide →Add Placeholder Images to UI Designs
Placeholder images help designers build realistic website layouts, mobile app screens, wireframes and interactive prototypes before final visual assets are available. They make it easier to evaluate spacing, image placement, aspect ratios, content hierarchy and responsive behavior during the design process.
Read the guide →Create Sample Documents for Demos
Learn how to use sample documents for product demos, prototypes, presentations and development testing. Explore document formats and practical examples.
Read the guide →Frequently Asked Questions
Yes. Testfilelab files are free for personal and commercial use. You do not need to create an account or provide attribution.
Yes. PDF, DOCX and XLSX files use real document structures, while PNG, JPEG, WebP and GIF files are genuine image files generated at the requested dimensions.
Document files can be generated to the exact requested byte size using binary units.
For example, 1 MB is 1,048,576 bytes, while 100 KB is 102,400 bytes.
Both definitions are used in computing. Testfilelab uses binary units, where:
1 MB = 1,048,576 bytes
Yes. Generated files have stable URLs that can be used with scripts, CI pipelines and automated test runners.
Document test files can be generated up to 100 MB. Images can be generated up to 5000x5000 pixels.
No. Testfilelab generates filler content and placeholder images rather than using real customer files.
Get the Exact File Your Test Needs
Pick a format. Choose a size. Get your test file without creating it yourself.
Browse Files