Enhanced ChatGPT Clone: Features Agents, MCP, DeepSeek, Anthropic, AWS, OpenAI, Responses API, Azure, Groq, o1, GPT-5, Mistral, OpenRouter, Vertex AI, Gemini, Artifacts, AI model switching, message search, Code Interpreter, langchain, DALL-E-3, OpenAPI Actions, Functions, Secure Multi-User Auth, Presets, open-source for self-hosting. Active. https://librechat.ai/
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Danny Avila 6ecd1b510f
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📎 fix: Route Unrecognized File Types via supportedMimeTypes Config (#12508)
* fix: check supportedMimeTypes before routing unrecognized file types

In processAttachments, files not matching the hardcoded mime type
categories (image, PDF, video, audio) were silently dropped. Now
resolves the endpoint's file config and checks the file type against
supportedMimeTypes before routing to the documents pipeline. Files
not matching any config are still skipped (original behavior).

Closes #12482

* feat: encode generic document types for supported providers

Remove restrictive mime type filter in encodeAndFormatDocuments that
only allowed PDFs and application/* types. Add a generic encoding
path for non-PDF, non-Bedrock files using the provider's native
format (Anthropic base64 document, OpenAI file block, Google media
block). Files are already validated upstream by supportedMimeTypes.

* fix: guard file.type and cache file config in processAttachments

- Add file.type truthiness check before checkType to prevent
  coercion of null/undefined to string 'null'/'undefined'
- Cache mergedFileConfig and endpointFileConfig on the instance
  so addPreviousAttachments doesn't recompute per message

* refactor: harden generic document encoding with validation and tests

- Extract formatDocumentBlock helper to eliminate ~30 lines of
  duplicate provider-dispatch code between PDF and generic paths
- Add size validation in generic encoding path using
  configuredFileSizeLimit (was fetched but unused)
- Guard Bedrock from generic path — non-bedrockDocumentFormats
  types are now skipped instead of silently tracking metadata
- Only push metadata to result.files when a document block was
  actually created, preventing silent inconsistent state
- Enable Anthropic citations for text/plain, text/html,
  text/markdown (supported by Anthropic's document API)
- Fix != to !== for Providers.AZURE comparison
- Add 9 tests covering all four provider branches, Bedrock
  exclusion, size limit enforcement, and unhandled provider

* fix: resolve filename type mismatch in formatDocumentBlock

filename parameter is string | undefined but OpenAIFileBlock and
OpenAIInputFileBlock require string. Default to 'document' when
filename is undefined.

* fix: use endpoint name for file config lookup in processAttachments

Agent runs can have agent.provider set to a base provider (e.g.,
openAI) while agent.endpoint is a custom endpoint name. Using
provider for the getEndpointFileConfig lookup bypassed custom
endpoint supportedMimeTypes config. Now uses agent.endpoint,
matching the pattern in addDocuments.

* perf: filter non-Bedrock files before fetching streams

Bedrock only supports types in bedrockDocumentFormats. Previously,
getFileStream was called for all files and unsupported types were
discarded after download. Now pre-filters the file list for Bedrock
to avoid unnecessary network and memory overhead for large
unsupported attachments.

* refactor: clean up processAttachments file config handling

- Remove redundant ?? null intermediaries; use instance properties
  directly in the else-if condition
- Add JSDoc @type annotations for _mergedFileConfig and
  _endpointFileConfig in the constructor

* refactor: harden document encoding and add routing tests

- Hoist configuredFileSizeLimit above the loop to avoid recomputing
  mergeFileConfig per file
- Replace Buffer.from decode with base64 length formula in the
  generic size check to avoid unnecessary heap allocation
- Use nullish coalescing (??) for filename fallback
- Clean up test: remove unnecessary type cast, use createMockRequest
  helper for size-limit test
- Add 14 tests for processAttachments categorization logic covering
  supportedMimeTypes routing, null/undefined guards, standard type
  passthrough, and edge cases

* fix: use optional chaining for checkType in routing tests

FileConfig.checkType is typed as optional. Use optional chaining
to satisfy strict type checking.

* fix: skip stream fetches for unsupported providers, block Bedrock generic routing

- Return early from encodeAndFormatDocuments when the provider is
  neither document-supported nor Bedrock, avoiding unnecessary
  getFileStream calls for providers that would discard all results
- Add !isBedrock guard to the supportedMimeTypes fallback branch in
  processAttachments so permissive patterns like '.*' don't route
  non-Bedrock types into documents that would be silently dropped
- Add test for Bedrock + non-Bedrock-document-type skipping

* fix: respect supportedMimeTypes config for Bedrock endpoints

Remove !isBedrock guard from the generic supportedMimeTypes routing
branch. If a user configures permissive supportedMimeTypes for a
Bedrock endpoint, the upload validation already accepted the file.
The encoding layer pre-filters to Bedrock-supported types before
fetching streams, so unsupported types are handled there without
silently dropping files the user explicitly allowed.
2026-04-01 23:04:43 -04:00
.devcontainer 🪦 refactor: Remove Legacy Code (#10533) 2025-12-11 16:36:12 -05:00
.github 🔬 ci: Add TypeScript Type Checks to Backend Workflow and Fix All Type Errors (#12451) 2026-03-28 21:06:39 -04:00
.husky 🎨 refactor: Redesign Sidebar with Unified Icon Strip Layout (#12013) 2026-03-22 01:15:20 -04:00
.vscode 🔐 feat: Granular Role-based Permissions + Entra ID Group Discovery (#7804) 2025-08-13 16:24:17 -04:00
api 📎 fix: Route Unrecognized File Types via supportedMimeTypes Config (#12508) 2026-04-01 23:04:43 -04:00
client 🎯 fix: MCP Tool Misclassification from Action Delimiter Collision (#12512) 2026-04-01 22:36:21 -04:00
config 📦 refactor: Consolidate DB models, encapsulating Mongoose usage in data-schemas (#11830) 2026-03-21 14:28:53 -04:00
e2e 🐘 feat: FerretDB Compatibility (#11769) 2026-03-21 14:28:49 -04:00
helm v0.8.4 (#12339) 2026-03-20 18:01:00 -04:00
packages 📎 fix: Route Unrecognized File Types via supportedMimeTypes Config (#12508) 2026-04-01 23:04:43 -04:00
redis-config 🔄 refactor: Migrate Cache Logic to TypeScript (#9771) 2025-10-02 09:33:58 -04:00
src/tests 🆔 feat: Add OpenID Connect Federated Provider Token Support (#9931) 2025-11-21 09:51:11 -05:00
utils 🐳 chore: Update image registry references in Docker/Helm configurations (#12026) 2026-03-02 22:14:50 -05:00
.dockerignore 🐳 : Further Docker build Cleanup & Docs Update (#1502) 2024-01-06 11:59:08 -05:00
.env.example ⚗️ feat: Agent Context Compaction/Summarization (#12287) 2026-03-21 14:28:56 -04:00
.gitattributes 🎛️ feat: DB-Backed Per-Principal Config System (#12354) 2026-03-25 19:39:29 -04:00
.gitignore 🧩 feat: Redesign Tool Call UI with Contextual Icons, Smart Grouping, and Rich Output Rendering (#12163) 2026-03-25 12:31:39 -04:00
.prettierrc 🧹 chore: Migrate to Flat ESLint Config & Update Prettier Settings (#5737) 2025-02-09 12:15:20 -05:00
AGENTS.md 📋 chore: Move project instructions from AGENTS.md to CLAUDE.md 2026-03-31 21:50:38 -04:00
bun.lock v0.8.4 (#12339) 2026-03-20 18:01:00 -04:00
CLAUDE.md 📋 chore: Move project instructions from AGENTS.md to CLAUDE.md 2026-03-31 21:50:38 -04:00
deploy-compose.yml 🔒 chore: Bump MongoDB from 8.0.17 to 8.0.20 in Docker Compose Files (#12399) 2026-03-25 13:56:43 -04:00
docker-compose.override.yml.example 🐳 chore: Update image registry references in Docker/Helm configurations (#12026) 2026-03-02 22:14:50 -05:00
docker-compose.yml 🔒 chore: Bump MongoDB from 8.0.17 to 8.0.20 in Docker Compose Files (#12399) 2026-03-25 13:56:43 -04:00
Dockerfile v0.8.4 (#12339) 2026-03-20 18:01:00 -04:00
Dockerfile.multi v0.8.4 (#12339) 2026-03-20 18:01:00 -04:00
eslint.config.mjs 🛡️ refactor: Self-Healing Tenant Isolation Update Guard (#12506) 2026-04-01 19:07:52 -04:00
librechat.example.yaml v0.8.3 (#12161) 2026-03-09 15:19:57 -04:00
LICENSE ⚖️ docs: Update LICENSE.md Year: 2024 -> 2025 (#5915) 2025-02-17 10:39:46 -05:00
package-lock.json 📦 chore: bump axios to exact v1.13.6, @librechat/agents to v3.1.63, @aws-sdk/client-bedrock-runtime to v3.1013.0 (#12488) 2026-03-31 14:49:31 -04:00
package.json v0.8.4 (#12339) 2026-03-20 18:01:00 -04:00
rag.yml 🐳 chore: Update image registry references in Docker/Helm configurations (#12026) 2026-03-02 22:14:50 -05:00
README.md 📝 docs: update deployment link for Railway in README and README.zh.md (#12449) 2026-03-28 20:10:36 -04:00
README.zh.md 📝 docs: update deployment link for Railway in README and README.zh.md (#12449) 2026-03-28 20:10:36 -04:00
turbo.json 🏎️ feat: Smart Reinstall with Turborepo Caching for Better DX (#11785) 2026-02-13 14:25:26 -05:00

LibreChat

English · 中文

Deploy on Railway Deploy on Zeabur Deploy on Sealos

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Features

  • 🖥️ UI & Experience inspired by ChatGPT with enhanced design and features

  • 🤖 AI Model Selection:

    • Anthropic (Claude), AWS Bedrock, OpenAI, Azure OpenAI, Google, Vertex AI, OpenAI Responses API (incl. Azure)
    • Custom Endpoints: Use any OpenAI-compatible API with LibreChat, no proxy required
    • Compatible with Local & Remote AI Providers:
      • Ollama, groq, Cohere, Mistral AI, Apple MLX, koboldcpp, together.ai,
      • OpenRouter, Helicone, Perplexity, ShuttleAI, Deepseek, Qwen, and more
  • 🔧 Code Interpreter API:

    • Secure, Sandboxed Execution in Python, Node.js (JS/TS), Go, C/C++, Java, PHP, Rust, and Fortran
    • Seamless File Handling: Upload, process, and download files directly
    • No Privacy Concerns: Fully isolated and secure execution
  • 🔦 Agents & Tools Integration:

    • LibreChat Agents:
      • No-Code Custom Assistants: Build specialized, AI-driven helpers
      • Agent Marketplace: Discover and deploy community-built agents
      • Collaborative Sharing: Share agents with specific users and groups
      • Flexible & Extensible: Use MCP Servers, tools, file search, code execution, and more
      • Compatible with Custom Endpoints, OpenAI, Azure, Anthropic, AWS Bedrock, Google, Vertex AI, Responses API, and more
      • Model Context Protocol (MCP) Support for Tools
  • 🔍 Web Search:

    • Search the internet and retrieve relevant information to enhance your AI context
    • Combines search providers, content scrapers, and result rerankers for optimal results
    • Customizable Jina Reranking: Configure custom Jina API URLs for reranking services
    • Learn More →
  • 🪄 Generative UI with Code Artifacts:

    • Code Artifacts allow creation of React, HTML, and Mermaid diagrams directly in chat
  • 🎨 Image Generation & Editing

  • 💾 Presets & Context Management:

    • Create, Save, & Share Custom Presets
    • Switch between AI Endpoints and Presets mid-chat
    • Edit, Resubmit, and Continue Messages with Conversation branching
    • Create and share prompts with specific users and groups
    • Fork Messages & Conversations for Advanced Context control
  • 💬 Multimodal & File Interactions:

    • Upload and analyze images with Claude 3, GPT-4.5, GPT-4o, o1, Llama-Vision, and Gemini 📸
    • Chat with Files using Custom Endpoints, OpenAI, Azure, Anthropic, AWS Bedrock, & Google 🗃️
  • 🌎 Multilingual UI:

    • English, 中文 (简体), 中文 (繁體), العربية, Deutsch, Español, Français, Italiano
    • Polski, Português (PT), Português (BR), Русский, 日本語, Svenska, 한국어, Tiếng Việt
    • Türkçe, Nederlands, עברית, Català, Čeština, Dansk, Eesti, فارسی
    • Suomi, Magyar, Հայերեն, Bahasa Indonesia, ქართული, Latviešu, ไทย, ئۇيغۇرچە
  • 🧠 Reasoning UI:

    • Dynamic Reasoning UI for Chain-of-Thought/Reasoning AI models like DeepSeek-R1
  • 🎨 Customizable Interface:

    • Customizable Dropdown & Interface that adapts to both power users and newcomers
  • 🌊 Resumable Streams:

    • Never lose a response: AI responses automatically reconnect and resume if your connection drops
    • Multi-Tab & Multi-Device Sync: Open the same chat in multiple tabs or pick up on another device
    • Production-Ready: Works from single-server setups to horizontally scaled deployments with Redis
  • 🗣️ Speech & Audio:

    • Chat hands-free with Speech-to-Text and Text-to-Speech
    • Automatically send and play Audio
    • Supports OpenAI, Azure OpenAI, and Elevenlabs
  • 📥 Import & Export Conversations:

    • Import Conversations from LibreChat, ChatGPT, Chatbot UI
    • Export conversations as screenshots, markdown, text, json
  • 🔍 Search & Discovery:

    • Search all messages/conversations
  • 👥 Multi-User & Secure Access:

    • Multi-User, Secure Authentication with OAuth2, LDAP, & Email Login Support
    • Built-in Moderation, and Token spend tools
  • ⚙️ Configuration & Deployment:

    • Configure Proxy, Reverse Proxy, Docker, & many Deployment options
    • Use completely local or deploy on the cloud
  • 📖 Open-Source & Community:

    • Completely Open-Source & Built in Public
    • Community-driven development, support, and feedback

For a thorough review of our features, see our docs here 📚

🪶 All-In-One AI Conversations with LibreChat

LibreChat is a self-hosted AI chat platform that unifies all major AI providers in a single, privacy-focused interface.

Beyond chat, LibreChat provides AI Agents, Model Context Protocol (MCP) support, Artifacts, Code Interpreter, custom actions, conversation search, and enterprise-ready multi-user authentication.

Open source, actively developed, and built for anyone who values control over their AI infrastructure.


🌐 Resources

GitHub Repo:

Other:


📝 Changelog

Keep up with the latest updates by visiting the releases page and notes:

⚠️ Please consult the changelog for breaking changes before updating.


Star History

Star History Chart

danny-avila%2FLibreChat | Trendshift ROSS Index - Fastest Growing Open-Source Startups in Q1 2024 | Runa Capital


Contributions

Contributions, suggestions, bug reports and fixes are welcome!

For new features, components, or extensions, please open an issue and discuss before sending a PR.

If you'd like to help translate LibreChat into your language, we'd love your contribution! Improving our translations not only makes LibreChat more accessible to users around the world but also enhances the overall user experience. Please check out our Translation Guide.


💖 This project exists in its current state thanks to all the people who contribute


🎉 Special Thanks

We thank Locize for their translation management tools that support multiple languages in LibreChat.

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