# aianytime/mistral-ocr-app architecture

> Architecture diagram of the GitHub repository aianytime/mistral-ocr-app, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-10). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/aianytime/mistral-ocr-app
- Repository: https://github.com/aianytime/mistral-ocr-app

## Overview

Mistral OCR App is a Streamlit interface for extracting text from PDFs and images supplied by URL or local upload. Users enter an API key, select document and source types, and process one or more documents. The app prepares each document, calls Mistral’s OCR endpoint, extracts page Markdown, and displays previews and OCR results with JSON and text download options. Components are mapped to main.py; some preparation and rendering details are supported by the README rather than the sampled excerpts.

Main entry points: [`main.py`](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py) (Session results)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_interface["User interface"]
  node_api_key["API key entry<br/>[main.py]"]
  node_source_choice["Source selection<br/>[main.py]"]
  node_document_choice["Document type<br/>[main.py]"]
end

subgraph group_ingestion["Document ingestion"]
  node_url_input["URL input<br/>[main.py]"]
  node_file_upload["Local uploads<br/>[main.py]"]
  node_document_prep["Document preparation<br/>[main.py]"]
end

subgraph group_ocr["OCR processing"]
  node_ocr_call["OCR request<br/>[main.py]"]
  node_result_extract["Result extraction<br/>[main.py]"]
end

subgraph group_outputs["Results and export"]
  node_session_results[("Session results<br/>[main.py]")]
  node_document_preview["Document preview<br/>[main.py]"]
  node_result_views["OCR result views<br/>[main.py]"]
  node_result_download["Result downloads<br/>[main.py]"]
end

node_user(("User"))
node_mistral_api{{"Mistral OCR API"}}

node_user -->|"enters key"| node_api_key
node_user -->|"chooses source"| node_source_choice
node_user -->|"chooses type"| node_document_choice
node_user -->|"provides URLs"| node_url_input
node_user -->|"uploads files"| node_file_upload
node_url_input -->|"prepares input"| node_document_prep
node_file_upload -->|"encodes uploads"| node_document_prep
node_document_prep -->|"submits document"| node_ocr_call
node_api_key -->|"authorizes request"| node_ocr_call
node_ocr_call -->|"posts OCR request"| node_mistral_api
node_mistral_api -->|"returns pages"| node_result_extract
node_result_extract -->|"stores text"| node_session_results
node_document_prep -->|"stores preview data"| node_session_results
node_session_results -->|"renders preview"| node_document_preview
node_session_results -->|"renders OCR text"| node_result_views
node_session_results -->|"exports results"| node_result_download

click node_api_key "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_source_choice "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_document_choice "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_url_input "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_file_upload "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_document_prep "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_ocr_call "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_result_extract "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_session_results "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_document_preview "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_result_views "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"
click node_result_download "https://github.com/aianytime/mistral-ocr-app/blob/main/main.py"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_api_key,node_source_choice,node_document_choice,node_user toneBlue
class node_url_input,node_file_upload,node_document_prep toneAmber
class node_ocr_call,node_result_extract,node_mistral_api toneMint
class node_session_results,node_document_preview,node_result_views,node_result_download toneRose
```

## Components

### User interface

- [API key entry](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Source selection](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Document type](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`

### Document ingestion

- [URL input](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Local uploads](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Document preparation](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`

### OCR processing

- [OCR request](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Result extraction](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`

### Results and export

- [Session results](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Document preview](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [OCR result views](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`
- [Result downloads](https://github.com/aianytime/mistral-ocr-app/blob/main/main.py): `main.py`

### Other components

- **User**
- **Mistral OCR API**

## Connections

- User → API key entry: enters key (evidence: `README.md`)
- User → Source selection: chooses source (evidence: `README.md`)
- User → Document type: chooses type (evidence: `README.md`)
- User → URL input: provides URLs (evidence: `README.md`)
- User → Local uploads: uploads files (evidence: `README.md`)
- URL input → Document preparation: prepares input (evidence: `README.md`)
- Local uploads → Document preparation: encodes uploads (evidence: `README.md`)
- Document preparation → OCR request: submits document (evidence: `main.py`)
- API key entry → OCR request: authorizes request (evidence: `main.py`)
- OCR request → Mistral OCR API: posts OCR request (evidence: `main.py`)
- Mistral OCR API → Result extraction: returns pages (evidence: `main.py`)
- Result extraction → Session results: stores text (evidence: `main.py`)
- Document preparation → Session results: stores preview data (evidence: `main.py`)
- Session results → Document preview: renders preview (evidence: `main.py`)
- Session results → OCR result views: renders OCR text (evidence: `main.py`)
- Session results → Result downloads: exports results (evidence: `README.md`)