SnapOtter/DOCKERHUB.md

SnapOtter

Open-source, self-hosted file-processing infrastructure. Convert, compress, OCR, transcribe, and run local AI across image, video, audio, PDF, and documents, via UI, REST API, and pipelines. 200+ tools in one stack, on your own hardware. Your files never leave your network.

SnapOtter 2.2 is out. The latest tag points at 2.2.0: 200+ tools across image, video, audio, PDF, and files, plus a layer-based editor and local AI. See the release notes.

What is SnapOtter?

SnapOtter is a privacy-first alternative to cloud file-processing services. Convert, compress, edit, and transform files in your browser while the work happens on a server you control. No uploads to third parties, no per-file pricing, no SaaS lock-in. It runs as a single container (embedded PostgreSQL 17 and Redis 8) or as a small Docker Compose stack for production, and works on AMD64 and ARM64.

Quick start

One command, no setup. The container starts an embedded PostgreSQL 17 and Redis 8 on the loopback interface and keeps all data in the SnapOtter-data volume:

docker run -d --name SnapOtter -p 1349:1349 -v SnapOtter-data:/data snapotter/snapotter:latest

The same image is also published to GHCR as ghcr.io/snapotter-hq/snapotter:latest. Embedded mode turns off automatically as soon as you set DATABASE_URL, so moving to the Compose stack later is just a config change.

Open http://localhost:1349 and log in.

Field	Value
Username	admin
Password	admin

You will be asked to change your password on first login.

Production: Docker Compose

For production, run PostgreSQL and Redis in their own containers. Save this as compose.yaml:

services:
  snapotter:
    image: snapotter/snapotter:latest
    ports: ["1349:1349"]
    environment:
      DATABASE_URL: postgres://snapotter:snapotter@postgres:5432/snapotter
      REDIS_URL: redis://redis:6379
    volumes:
      - SnapOtter-data:/data
    depends_on: [postgres, redis]
    restart: unless-stopped
  postgres:
    image: postgres:17-alpine
    environment:
      POSTGRES_USER: snapotter
      # Change this for any non-local deployment.
      POSTGRES_PASSWORD: snapotter
      POSTGRES_DB: snapotter
    volumes: ["SnapOtter-pgdata:/var/lib/postgresql/data"]
    restart: unless-stopped
  redis:
    image: redis:8-alpine
    volumes: ["SnapOtter-redisdata:/data"]
    restart: unless-stopped
volumes:
  SnapOtter-data:
  SnapOtter-pgdata:
  SnapOtter-redisdata:

Then start the stack:

docker compose up -d

The first boot seeds an admin account from DEFAULT_USERNAME and DEFAULT_PASSWORD, both admin unless you set them. Set DEFAULT_PASSWORD on the snapotter service before the first start of any non-local deployment.

Supported tags and platforms

Tag	Description
latest	Latest release
2.2.0	Exact version
2.2	Latest patch in the 2.2.x line
2	Latest minor in the 2.x line

Architecture	GPU support	Notes
linux/amd64	NVIDIA CUDA	Full CUDA acceleration for AI tools
linux/arm64	CPU only	Raspberry Pi 4/5, Apple Silicon via Docker Desktop

The same image runs on CPU or NVIDIA CUDA. Intel/AMD iGPU acceleration through VA-API, Quick Sync, or OpenCL is not supported for AI inference today; those systems run AI tools on CPU. See Docker Tags for benchmarks and version-pinning details.

Features

• 200+ tools across 5 modalities
  • Image (107): resize, crop, compress, convert, watermark, color adjust, beautify screenshots, generate memes, vectorize, GIF tools, find duplicates, passport photos, and more. Supports 55+ input formats (including 23 camera RAW formats) and 17 output formats.
  • Video (57): convert, compress, trim, resize, crop, merge, video-to-GIF, extract audio, stabilize, change FPS, burn or extract subtitles, and more.
  • Audio (27): convert, trim, normalize, volume, fade, pitch shift, silence removal, noise reduction, merge or split, waveform, and more.
  • Documents / PDF (29): merge, split, compress, convert (Word, Excel, PowerPoint, EPUB), protect or unlock, redact, watermark, page numbers, OCR, and more.
  • Files (23): CSV, JSON, XML, and YAML conversion, CSV merge or split, chart maker, ZIP create or extract.
• Image editor: layer-based editor with brushes, shapes, adjustments, filters, curves, and keyboard shortcuts. Runs in your browser, processes on your hardware.
• Local AI: remove backgrounds, upscale images, restore and colorize old photos, erase objects, blur faces, enhance faces, extract text (OCR from images and PDFs), transcribe audio, auto-generate video subtitles, expand canvas, and fix transparency. All on your hardware, no internet required. Built-in Fast OCR adds about 25 MiB to the official image; the optional accuracy pack installs on demand.
• OIDC / SSO: log in with Google, GitHub, Okta, or any OpenID Connect provider.
• 21 languages: including Arabic (with RTL support), Chinese (Simplified and Traditional), French, German, Hindi, Japanese, Korean, Portuguese, Russian, Spanish, and more.
• Pipelines: chain tools into reusable workflows, 20 steps by default (MAX_PIPELINE_STEPS). Import and export as JSON. Batch size is unlimited in this image (MAX_BATCH_SIZE=0).
• REST API: every tool available via API with API key auth. Interactive docs at /api/docs.
• Privacy first: your files never leave your network. Anonymous product analytics (which tools are used and which errors happen, never file data) are on by default. An admin can turn them off instance-wide in Settings, or set ANALYTICS_ENABLED=false to disable them completely.

Configuration

Common environment variables (set on the snapotter service). Use 0 for unlimited or auto where noted.

Variable	Default	Description
DATABASE_URL	(unset)	PostgreSQL connection string. Required for the Compose stack. Leave it and REDIS_URL unset and the container runs its own PostgreSQL and Redis.
REDIS_URL	(unset)	Redis connection string. Same rule as DATABASE_URL.
AUTH_ENABLED	true	Set false to run without login (creates a synthetic anonymous admin).
DEFAULT_USERNAME	admin	Initial admin username.
DEFAULT_PASSWORD	admin	Initial admin password. Change this for any non-local deployment.
MAX_UPLOAD_SIZE_MB	0	Max upload size in MB. 0 is unlimited.
MAX_BATCH_SIZE	0	Max files per batch. 0 is unlimited.
CONCURRENT_JOBS	0	Worker concurrency. 0 auto-detects from CPU.
PROCESSING_TIMEOUT_S	0	Per-job timeout in seconds. 0 is unlimited.
RATE_LIMIT_PER_MIN	1000	API requests per minute per client. 0 disables the limit.
SESSION_DURATION_HOURS	168	Login session length in hours.
TRUST_PROXY	loopback,linklocal,uniquelocal	Which peers may set the client IP via X-Forwarded-For. Private-network peers only by default, so a reverse proxy on a Docker network or a LAN is believed and a public client's forged header is not. Set true only if a proxy you control sits in front on a public address.
ANALYTICS_ENABLED	true	Set false to disable anonymous product analytics entirely.
EXTERNAL_URL		Public URL of the instance, required for OIDC redirects.
SQLITE_MIGRATE_PATH		Path to a 1.x SQLite database to import on first boot.

OIDC, SSO, S3 storage, and the full variable reference are documented in Configuration and OIDC / SSO.

Volumes

Path	Purpose
/data	AI models and persistent user files; in single-container mode also the embedded PostgreSQL and Redis data. Back this up.
/tmp/workspace	Temporary processing files (auto-cleaned).

In the Compose stack, PostgreSQL and Redis keep their own volumes (SnapOtter-pgdata, SnapOtter-redisdata).

Ports

Port	Purpose
1349	Web UI and REST API

NVIDIA CUDA acceleration

The amd64 image bundles CUDA. With an NVIDIA GPU and the NVIDIA Container Toolkit installed, add this to the snapotter service to accelerate background removal, upscaling, and transcription. OCR remains CPU-based and works unchanged on the same host:

    deploy:
      resources:
        reservations:
          devices:
            - driver: nvidia
              count: 1
              capabilities: [gpu]

The image auto-detects NVIDIA CUDA at runtime and falls back to CPU when CUDA is unavailable. Mapping /dev/dri for Intel or AMD GPUs does not accelerate SnapOtter AI tools today. Benchmarks are in Docker Tags.

Upgrading from SnapOtter 1.x

v1.x stored data in SQLite. Back up the whole /data volume before you start, not just snapotter.db: 1.x runs SQLite in WAL mode, so most of your recent data is sitting in snapotter.db-wal. Then set SQLITE_MIGRATE_PATH=/data/snapotter.db on the snapotter service for the first boot and remove the variable once the migration succeeds. Your files and settings are preserved. Full walkthrough: Upgrading from 1.x.

Documentation

• Getting Started
• Configuration
• Deployment
• Docker Tags and GPU
• OIDC / SSO
• REST API
• Source on GitHub
• Report an issue

License

Dual-licensed under AGPLv3 and a commercial license. Use, modify, and self-host freely under the AGPLv3; if you run a modified version as a network service, you must make your source available under the AGPLv3. For proprietary or SaaS use where source disclosure is not suitable, a commercial license is available. Contact contact@snapotter.com.