Filestack Image Transformations

Best Self Hosted Alternatives to Filestack Image Transformations

A curated collection of the 4 best self hosted alternatives to Filestack Image Transformations.

Cloud image processing and editing service offering URL-based APIs and SDKs to resize, crop, convert, compress and apply filters, plus face detection, GIF/collage creation and automatic optimization for web delivery.

Alternatives List

#1
Posterizarr

Posterizarr

Posterizarr automates creation of textless posters and overlays for Plex, Jellyfin, and Emby, pulling artwork from common metadata sources with a web UI and automation hooks.

Posterizarr is an automated poster-making tool for media server libraries, focused on generating clean, textless artwork and consistent branding across collections. It can fetch artwork from common metadata providers and apply custom overlays and text through a browser-managed workflow.

Key Features

  • Web UI to configure settings, monitor activity, and trigger runs
  • Supports Plex, Jellyfin, and Emby libraries
  • Fetches artwork from multiple sources (including TMDB, TVDB, Fanart.tv, and more)
  • Focus on selecting and producing textless images for cleaner libraries
  • Custom overlays and optional text to standardize posters across collections
  • Kometa-compatible folder structure for asset organization
  • Automation integrations to trigger runs from tools like Sonarr, Radarr, and Tautulli

Use Cases

  • Standardize poster styles for movies and TV shows across a media server
  • Automatically generate collection/series branding with overlays
  • Maintain an assets folder for Kometa-managed library customization

Limitations and Considerations

  • Best results depend on external metadata/artwork availability and quality
  • Requires additional dependencies for image processing in typical setups

Posterizarr is a practical choice for homelab and media-library users who want consistent visuals without manual poster hunting. Its web UI and automation hooks make it suitable for continuous, set-and-forget library curation.

743stars
32forks
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#2
Imagor Studio

Imagor Studio

Self-hosted image gallery and live editing app with virtual scrolling, non-destructive edits, instant URL-based transforms, S3/local storage support, and mobile-optimized UI.

Imagor Studio screenshot

Imagor Studio is a self-hosted image gallery and live editing web application designed for creators. It provides a high-performance gallery plus professional, non-destructive image editing with instant preview and URL-based transforms.

Key Features

  • High-performance virtual-scrolling gallery for fast browsing of large photo collections
  • Live, non-destructive image editing with real-time preview, color adjustments, effects, and cropping
  • Instant URL generation for transformed images to enable on-the-fly delivery and embedding
  • Universal storage support: local filesystems and S3-compatible object stores
  • Zero-configuration quick start with SQLite by default and Docker images for easy deployment
  • Touch-optimized, responsive React-based interface with EXIF metadata display
  • Built on a performant image processing stack (libvips/imagor) for efficient transforms and streaming

Use Cases

  • Photographers and hobbyists managing large local photo libraries with fast browsing and edits
  • Designers and content creators applying quick non-destructive transforms and producing shareable image URLs
  • Teams or websites that need on-the-fly optimized images via generated URLs backed by an image processing server

Limitations and Considerations

  • Intended primarily for single-site or small-team use; large-scale, multi-tenant deployments may require separate imagor scaling, caching, and storage tuning
  • Feature set assumes an external imagor processing backend for heavy production workloads; performance depends on that infrastructure

Imagor Studio combines a modern, touch-friendly UI with a high-performance image processing ecosystem to provide fast browsing and professional live editing for creators. It is suited for local and S3-backed collections and is deployable via Docker for quick setup.

179stars
4forks
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#3
FileFlows

FileFlows

Self-hosted workflow automation for media and file libraries—watch folders, run FFmpeg/metadata steps, and route outputs with a visual flow builder.

FileFlows screenshot

FileFlows is a self-hosted, visual workflow automation tool focused on processing files—commonly media—based on events like new/changed files in watched folders. It lets you build flows (pipelines) that analyze, transform, move, and notify, using a library of reusable nodes and tools.

Key Features

  • Visual flow builder for creating file-processing pipelines (node/graph based)
  • Watch folders and triggers to automatically run flows on new or modified files
  • Media-centric processing steps (e.g., transcode/remux, probe/inspect media)
  • Integration with external tools (commonly FFmpeg) via dedicated nodes/scripts
  • Conditional logic and routing (decisions, branching, filtering)
  • Central dashboard for job history, status, and troubleshooting
  • Runs as a server with workers/nodes to scale processing across machines

Use Cases

  • Automatically transcode and standardize video libraries when new files arrive
  • Validate, rename, and organize downloads into a consistent folder structure
  • Generate derivatives (e.g., lower-bitrate versions) and route outputs to storage

Limitations and Considerations

  • Feature set is oriented toward file/media pipelines; it’s not a general-purpose iPaaS
  • Effective use typically requires familiarity with media tooling (e.g., FFmpeg) and codecs

FileFlows fits teams and home labs that want repeatable, automated processing for incoming files with a visual pipeline approach. It’s especially useful for media libraries where consistent encoding, structure, and automated handling reduce manual work.

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#4
ResourceSpace

ResourceSpace

ResourceSpace is an open-source digital asset management (DAM) system for storing, organizing, searching, and securely sharing files with metadata, permissions, and auditing.

ResourceSpace screenshot

ResourceSpace is an open-source digital asset management (DAM) platform for centralizing, organizing, and distributing digital files across teams. It focuses on metadata-driven search, controlled sharing, and governance features suited to organizations that need structured asset libraries.

Key Features

  • Centralized library for digital assets with metadata fields for structured cataloging
  • Advanced search and filtering to quickly find assets across large collections
  • Granular permissions and role-based access controls for secure collaboration
  • Audit trails and activity logging for governance and compliance workflows
  • Version control to manage updates and maintain asset history
  • Usage reporting and download logs to understand how assets are consumed
  • Integrations via plugins and an API, including support for single sign-on deployments

Use Cases

  • Managing brand, marketing, and communications assets across distributed teams
  • Building searchable archives for museums, cultural institutions, and publishers
  • Secure distribution of approved assets to internal stakeholders or external partners

Limitations and Considerations

  • Source distribution is maintained in Subversion; Git workflows typically use a git-svn bridge

ResourceSpace is a solid choice for teams needing a flexible DAM with strong permissions, auditing, and metadata-driven discovery. It fits well in environments where controlled access and structured asset governance are required.

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Why choose an open source alternative?

  • •Data ownership: Keep your data on your own servers
  • •No vendor lock-in: Freedom to switch or modify at any time
  • •Cost savings: Reduce or eliminate subscription fees
  • •Transparency: Audit the code and know exactly what's running