SnapOtter/DOCKERHUB.md

SnapOtter

Open-source, self-hostable file manipulation suite. 200+ tools across image, video, audio, documents, and files, plus a layer-based image editor and local AI. Everything runs on your own hardware, so your files never leave your network.

SnapOtter v2.0.0 is coming soon. The current latest image is v1.x and includes image tools only. v2.0 adds 200+ tools across image, video, audio, documents, and files. We are fixing a last-minute issue with local AI installs before publishing the new image. Stay tuned.

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 small Docker Compose stack (the app plus PostgreSQL 17 and Redis 8) and works on AMD64 and ARM64.

Quick start

SnapOtter runs alongside PostgreSQL 17 and Redis 8. 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
      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

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

Field	Value
Username	admin
Password	admin

You will be asked to change your password on first login. Change DEFAULT_PASSWORD for any non-local deployment.

Supported tags and platforms

Tag	Description
latest	Latest release
1.11.0	Exact version
1.11	Latest patch in the 1.11.x line
1	Latest minor in the 1.x line

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

The same image runs on CPU or GPU. See Docker Tags for benchmarks and version-pinning details.

Features

• 200+ tools across 5 modalities
  • Image (105): 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 14 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 (28): 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.
• 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 with unlimited steps. Import and export as JSON. Batch process unlimited files at once.
• REST API: every tool available via API with API key auth. Interactive docs at /api/docs.
• Privacy first: your files never leave your network. SnapOtter asks once whether you want to share anonymous product analytics (which tools are used and errors encountered, never file data). Change it anytime in Settings, or set ANALYTICS_ENABLED=false to disable it completely.

Configuration

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

Variable	Default	Description
DATABASE_URL	(required)	PostgreSQL connection string.
REDIS_URL	(required)	Redis connection string.
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	300	API requests per minute per client.
SESSION_DURATION_HOURS	168	Login session length in hours.
TRUST_PROXY	true	Trust X-Forwarded-* headers behind a reverse proxy.
ANALYTICS_ENABLED	asks on first run	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. Back this up.
/tmp/workspace	Temporary processing files (auto-cleaned).

PostgreSQL and Redis keep their own volumes (snapotter-pgdata, snapotter-redisdata) in the Compose stack above.

Ports

Port	Purpose
1349	Web UI and REST API

GPU 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, OCR, and transcription:

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

The image auto-detects the GPU at runtime and falls back to CPU when none is present. Benchmarks are in Docker Tags.

Upgrading from SnapOtter 1.x

v1.x stored data in SQLite. To import it into the new PostgreSQL stack, set SQLITE_MIGRATE_PATH=/data/snapotter.db on the snapotter service for the first boot, then remove the variable once the migration succeeds. Your files and settings are preserved.

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.