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imagor

Free#25 of 28 in Photo Resizing Software

imagor: A flexible self-hosted image service for developers who need programmatic transformations. Ranked #25 of 28 in Photo Resizing Software by our editors (6.6/10); pricing: Open source; best for developers needing flexible Go image services.

6.6/10Editor score

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At a glance

Editor score
6.6 / 10
Pricing
Open source
Best for
Developers needing flexible Go image services
Paid from
Free
Facts checked
20 Sep 2026

Where it wins
- Supports resizing, cropping, fitting, smart cropping, and format conversion
- Works with file-system, S3, Google Cloud, and HTTP storage
- Offers URL signing, quality controls, and configurable security controls
Where it doesn't
- Requires a self-hosted deployment rather than a consumer desktop or mobile app
- Its focus is programmatic image processing, not visual editing workflows
- Uses dimensions as its resize method, limiting the scope of resize controls

Our verdict on imagor

imagor is an open-source HTTP image-processing server and Go library for developers and teams building programmatic image transformation workflows. It supports dimension-based resizing and cropping, fit-in, full-fit-in, adaptive-fit-in, and stretch modes, plus smart cropping with focal-point detection. The service can also convert output formats, control quality and lossless encoding, extract metadata, accept POST image uploads, and perform direct transformations. Its published output formats include JPEG, PNG, GIF, WebP, AVIF, JXL, TIFF, and JP2, making it suited to self-hosted image delivery rather than consumer desktop or mobile resizing.

Its strongest advantage is deployment and storage flexibility. imagor runs on web and Linux environments, supports Docker, and can load or store images through the file system, HTTP, Amazon S3, and Google Cloud Storage. That gives teams several ways to fit it into an existing delivery or processing workflow. URL signing and configurable security controls add useful safeguards for transformation endpoints. Developers who want a Go library alongside an HTTP service can also use the same project across application and service layers.

The trade-off is that imagor is a focused infrastructure component, not a visual editor or a ready-made consumer application. Teams should choose it when they want control over image-processing behavior, storage backends, deployment, and integration through HTTP or Go. It is less suitable for users looking for desktop or mobile resizing, guided editing, or a managed workflow. The open-source model keeps the product centered on self-hosted implementation, so its value depends on whether a development team wants to operate an image-processing service rather than select a point-and-click tool.

Your product? Our editors can test imagor in depth and publish a review, labelled as paid · from $149/mo →

imagor pricing

Plans Open sourceFree Free to use — no paid tier required for the core job.

See plans on docs.imagor.net

imagor fact sheet

Free plan	Not verified
Paid from	Free
Batch resizing	Not verified
Output formats	jpeg, png, gif, webp, avif, jxl, tiff, jp2
Resize methods	Dimensions
Quality controls	Yes
Maximum batch size	Not verified
Supported platforms	Web
Deployment	Self-hosted
Platforms	Web, Linux
Support	Docs, Community
Built for	Small business, Mid-market, Enterprise (editorial estimate)
Integrations	4 integrations: Amazon S3, Google Cloud Storage, HTTP, Docker
Pricing	Open source
Website	docs.imagor.net
Facts checked	20 Sep 2026

imagor integrations

imagor lists 4 integrations on its own site.

Amazon S3
Google Cloud Storage
HTTP
Docker

Alternatives to imagor

See all imagor alternatives →

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Featured on iTechGuides

imagor is listed in our Photo Resizing Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 7 Oct 2026 · How we research and update