iLoveIMG
TinyPNG
Squoosh
Caesium Image Compressor
Compressor.io
Image Resizer for Windows
Resizing.app
Free online app to crop and resize images

Buffer
Upload-Post
Ayrshare
Hootsuite
getLATE.dev
Postiz
Zernio
Postproxy is a unified API to publish, manage comments, direct messages, and reviews across Instagram, TikTok, LinkedIn, X, YouTube, Facebook, Threads, Bluesky, and more.

Which is more popular?
Based on our record, ImageResizer seems to be more popular. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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IR
ImageResizer
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|---|---|---|
| Website | imageresizer.com | postproxy.dev |
| Pricing | — | |
| Company | — | Startup from Germany · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.

No description of ImageResizer yet.
Postproxy is a social media API for products that need more than publishing. Publish posts, manage comments, DMs and reviews, track post and profile analytics, and receive webhooks across major platforms. Built for SaaS products, automation workflows, and agents that need reliable social media...
What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.

Overall verdict
Why this product is good
Recommended for
ImageResizer is recommended for bloggers, small business owners, photographers, and graphic designers who need a convenient and efficient way to process images for websites, social media, or print media without high expenditure on advanced editing software.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
Imageresizerr.com Reviews [ With Proof Scam or Legit ? ] Imageresizer ! Imageresizer Com Reviews
Postproxy Walkthrough: Social Media API for Publishing, Comments & DMs
How often each product is chosen within a category, 0–100% relative to the other.

As answered by people managing ImageResizer and Postproxy.
Postproxy's answer:
We were building a product for ads creation at scale with fancy templates management, different platforms with adaptive sizing. Then Nano Banana got released and made a product largely obsolete. Postproxy was basically a part of that product.
Postproxy's answer:
Postproxy is a production-grade social media API for SaaS products, AI agents, and multi-tenant platforms. It provides one API for publishing, comments, direct messages, reviews, analytics, webhooks, and OAuth account connections across Instagram, Facebook, Threads, LinkedIn, TikTok, X, YouTube, Pinterest, Google Business Profile, Bluesky, and Telegram.
Compared with publishing-only APIs and automation tools, Postproxy is designed for customer-facing products that require official platform integrations, explicit delivery statuses, automatic retries, profile-group isolation, predictable pricing, and infrastructure built for production workloads.
Postproxy's answer:
Postproxy combines production-grade publishing infrastructure, engagement, and analytics in one social media API. Every publishing request has an explicit status and human-readable failure reason, failed deliveries can be retried automatically, and the same platform also handles comments, direct messages, reviews, profile analytics, and webhooks.
Postproxy uses official platform APIs and OAuth flows, supports isolated profile groups for multi-tenant products, and provides integrations for n8n, Make, and Zapier, as well as an MCP server for AI agents.
Postproxy's answer:
Postproxy is primarily built for developers and product teams creating SaaS platforms, AI agents, marketing tools, and multi-tenant social media products. It is also used by agencies and automation specialists that manage social accounts for multiple customers.
Individual creators can use Postproxy, but the platform is optimized for software products and production workflows rather than manual social media management.
Share your experience with using ImageResizer and Postproxy. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

800x450 is 2.4 times smaller then regular HD quality (1920x1080), you can use https://imageresizer.com/ to resize your image. Source: over 3 years ago
The bot's avatar image you're attaching might be too large. If that is the case use a service like https://imageresizer.com to shrink it to a reasonable size. Under 1MB is safe. Source: over 3 years ago
Windows PTs only has a simple resize tool. What you want is https://imageresizer.com/ that is mentioned in the sticky guide that has a crop function as well. I hope this helps :). Source: over 3 years ago
Tracking Postproxy since Feb 2026.
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Buffer makes it super easy to share any page you're reading. Keep your Buffer topped up and we automagically share them for you through the day.
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Make your website faster and save bandwidth. TinyPNG optimizes your PNG images by 50-80% while preserving full transparency!
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Social Media API for developers. Post to TikTok, Instagram, YouTube, Facebook & 19 more platforms with one API call. MCP server for Claude/ChatGPT, white-label for SaaS. 70k+ users.
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Compress and compare images with different codecs, right in your browser
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Powerful APIs that enable you to send social media posts effortlessly. Post and manage your users social account via an API.
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