Best OCR APIs in 2026

from google.cloud import documentai_v1 as documentai

client = documentai.DocumentProcessorServiceClient()
processor = "projects/my-project/locations/us/processors/PROCESSOR_ID"

with open("invoice.pdf", "rb") as f:
    raw_document = documentai.RawDocument(content=f.read(), mime_type="application/pdf")

request = documentai.ProcessRequest(name=processor, raw_document=raw_document)
result = client.process_document(request=request)

for entity in result.document.entities:
    print(f"{entity.type_}: {entity.mention_text} (confidence: {entity.confidence:.2f})")

import boto3

textract = boto3.client("textract")

with open("form.pdf", "rb") as f:
    response = textract.analyze_document(
        Document={"Bytes": f.read()},
        FeatureTypes=["TABLES", "FORMS", "SIGNATURES"],
    )

for block in response["Blocks"]:
    if block["BlockType"] == "KEY_VALUE_SET" and "KEY" in block.get("EntityTypes", []):
        key_text = block.get("Text", "")
        print(f"Form field: {key_text}")

import pytesseract
from PIL import Image

# Basic text extraction
img = Image.open("document.png")
text = pytesseract.image_to_string(img, lang="eng")
print(text)

# Get word-level bounding boxes with confidence
data = pytesseract.image_to_data(img, output_type=pytesseract.Output.DICT)
for i, word in enumerate(data["text"]):
    if int(data["conf"][i]) > 60:
        print(f"{word} at ({data['left'][i]}, {data['top'][i]}) conf={data['conf'][i]}")

from azure.ai.documentintelligence import DocumentIntelligenceClient
from azure.core.credentials import AzureKeyCredential

client = DocumentIntelligenceClient(
    endpoint=ENDPOINT,
    credential=AzureKeyCredential(KEY),
)

with open("receipt.jpg", "rb") as f:
    poller = client.begin_analyze_document("prebuilt-receipt", body=f)
    result = poller.result()

for doc in result.documents:
    for field_name, field in doc.fields.items():
        print(f"{field_name}: {field.content} (confidence: {field.confidence:.2f})")

import easyocr

reader = easyocr.Reader(["en", "ja", "zh-cn"], gpu=True)

results = reader.readtext("multilingual_doc.jpg")
for bbox, text, confidence in results:
    print(f"Text: {text} (confidence: {confidence:.2f})")
    print(f"  Bounding box: {bbox}")

from paddleocr import PaddleOCR

ocr = PaddleOCR(use_angle_cls=True, lang="en")  # or "ch" for Chinese

result = ocr.ocr("document.jpg", cls=True)
for line in result[0]:
    bbox, (text, confidence) = line
    print(f"Text: {text} (confidence: {confidence:.2f})")

// ABBYY FineReader Engine, C# example
using ABBYY.FineReaderEngine;

IEngine engine = new Engine();
engine.LoadPredefinedProfile("DocumentConversion_Accuracy");

IFRDocument doc = engine.CreateFRDocument();
doc.AddImageFile("complex_document.tiff");
doc.Process();

// Export as searchable PDF
doc.Export("output.pdf", FileExportFormatEnum.FEF_PDF);

// Get recognized text
string fullText = doc.PlainText.Text;
Console.WriteLine(fullText.Substring(0, 500));

import requests

response = requests.post(
    f"https://app.nanonets.com/api/v2/OCR/Model/{MODEL_ID}/LabelFile/",
    headers={"Authorization": f"Basic {NANONETS_API_KEY}"},
    files={"file": open("invoice.pdf", "rb")},
)

for prediction in response.json()["result"][0]["prediction"]:
    print(f"{prediction['label']}: {prediction['ocr_text']} "
          f"(confidence: {prediction['score']:.2f})")

import requests

response = requests.post(
    "https://api.mathpix.com/v3/text",
    headers={
        "app_id": MATHPIX_APP_ID,
        "app_key": MATHPIX_APP_KEY,
        "Content-type": "application/json",
    },
    json={
        "src": image_url,
        "formats": ["latex_styled", "text"],
        "data_options": {"include_asciimath": True},
    },
)

result = response.json()
print(f"LaTeX: {result['latex_styled']}")
print(f"Text: {result['text']}")

import Tesseract from "tesseract.js";

const worker = await Tesseract.createWorker("eng");

const { data } = await worker.recognize(imageFile);
console.log("Text:", data.text);
console.log("Confidence:", data.confidence);

for (const word of data.words) {
  console.log('"${word.text}" at (${word.bbox.x0}, ${word.bbox.y0}) conf=${word.confidence}');
}

await worker.terminate();