
The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Bulk Resize Photos
Batch Image Resizer
Batch Resizer
Image Resizer for Windows
Picture Resizer
Resize The Image
ProBatchResizer | Multiple Image Resizer A professional-grade, browser-based tool for batch resizing and converting images. Featuring 130+ ready-to-use presets, it uses WebAssembly to ensure your images never leave your device.

Website, pricing, platforms and company facts side by side.
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| Website | diffyn.com | probatchresizer.com |
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| Company | — | Startup from the United States · 1 - 9 employees · 2026 |
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In their own words, as submitted to SaaSHub.


No description of Diffyn yet.
I built ProBatchResizer to solve two problems: the tedious task of looking up image dimensions for different platforms and the privacy risk of uploading company assets to random servers. It uses WebAssembly and Multi-threading to do all the heavy lifting directly in the user's browser. It...
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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
This Tool Resizes 100s of Images in Bulk — Without Uploading Anything probatchresizer.com
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Diffyn and Pro Batch Resizer.
Diffyn's answer
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Pro Batch Resizer's answer:
It is the only batch resizer that combines 100% local browser-based processing (Privacy-First) with a massive library of 130+ specialized presets for social media, marketing, and print.
Diffyn's answer
Diffyn is the platform that specializes on both change management and multi-model analysis.
Pro Batch Resizer's answer:
Users choose us for security and speed. Unlike competitors, we never upload your images to a server. Plus, our multi-unit support (px, cm, mm, in) and built-in "polishing" tools (crop/rotate) create a complete professional workflow in one tab.
Diffyn's answer
React, Next.js, POSTGRESQL
Pro Batch Resizer's answer:
The core engine is built on WebAssembly (WASM) and Multi-threading to enable high-performance image processing directly in the browser. The frontend is built with React and Tailwind CSS for a fast, responsive user experience.
Diffyn's answer
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Pro Batch Resizer's answer:
Social media managers, e-commerce sellers (Shopify/Amazon), digital marketers, and graphic designers who need to quickly and securely optimize large batches of images for multiple platforms.
Diffyn's answer
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
Pro Batch Resizer's answer:
It was born out of frustration with the "privacy tax"—the risk of uploading sensitive assets to third-party servers just to resize them. I built it to provide a desktop-grade, secure tool that eliminates the need to manually look up platform dimensions.
Pro Batch Resizer's answer:
While we respect user privacy and don't track identities, our tool is widely used by freelance creative agencies, independent e-commerce brand owners, and privacy-conscious marketing teams who handle sensitive corporate assets.
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