extract-data/index.html at main · devvspl/extract-data · GitHub

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>OCR PDF to JSON (Groq API - Free Model)</title>
    <link
      href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css"
      rel="stylesheet"
    />
    <script src="https://cdnjs.cloudflare.com/ajax/libs/pdf.js/2.16.105/pdf.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/tesseract.js/4.0.2/tesseract.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/json5/2.2.3/index.min.js"></script>
  </head>
  <body class="bg-light">
    <div class="container mt-5">
      <h2 class="mb-4 text-center">PDF to JSON Extractor</h2>

      <div class="card p-4 shadow-sm">
        <label class="form-label"><strong>Select PDF File:</strong></label>
        <input
          type="file"
          id="pdfInput"
          class="form-control"
          accept="application/pdf"
        />
        <button id="extractBtn" class="btn btn-primary mt-3 w-100">
          Extract
        </button>

        <p
          id="statusMessage"
          class="text-center mt-3 text-muted"
          style="display: none"
        >
          <strong>⏳ Please wait, processing...</strong>
        </p>

        <div class="mt-4">
          <h5>Extracted JSON Output:</h5>
          <pre
            id="output"
            class="bg-dark text-light p-3 rounded"
            style="max-height: 300px; overflow: auto"
          ></pre>
        </div>
      </div>
    </div>

    <script>
      document
        .getElementById("extractBtn")
        .addEventListener("click", async function () {
          const fileInput = document.getElementById("pdfInput");
          const statusMessage = document.getElementById("statusMessage");
          const output = document.getElementById("output");

          if (!fileInput.files.length) {
            alert("Please select a PDF file first.");
            return;
          }

          statusMessage.style.display = "block";
          output.innerText = "";

          const file = fileInput.files[0];
          const reader = new FileReader();

          reader.onload = async function () {
            const pdfData = new Uint8Array(reader.result);
            const pdf = await pdfjsLib.getDocument({ data: pdfData }).promise;
            let extractedText = "";

            for (let pageNum = 1; pageNum <= pdf.numPages; pageNum++) {
              const page = await pdf.getPage(pageNum);
              const scale = 2;
              const viewport = page.getViewport({ scale });
              const canvas = document.createElement("canvas");
              const context = canvas.getContext("2d");
              canvas.width = viewport.width;
              canvas.height = viewport.height;

              await page.render({ canvasContext: context, viewport }).promise;

              await Tesseract.recognize(canvas.toDataURL("image/png"), "eng")
                .then(({ data: { text } }) => {
                  extractedText += text + "\n\n";
                })
                .catch((err) => {
                  console.error(`Error processing page ${pageNum}:`, err);
                });
            }

            console.log("Extracted Raw Text:", extractedText);
            sendToGroqAPI(extractedText);
          };

          reader.readAsArrayBuffer(file);
        });

      async function sendToGroqAPI(extractedText) {
        const groq_api_key = "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";
        const groq_url = "https://api.groq.com/openai/v1/chat/completions";

        const prompt = `Extract and structure the following text into valid JSON format:
        - Company Name
        - Voucher No
        - Date
        - Location
        - Receiver Name
        - Received From
        - Particular
        - Amount
        - Remark (Ensure it contains all key details like amount, reason, reference number, and transaction context)

        **Important:**
        - JSON format must be **valid**.
        - "Remark" should be **a single well-structured plain text string** containing all key details.
        - Do not return "Remark" in a nested JSON format.
        - Ensure the "Remark" is clear, detailed, and includes all necessary information.

        **Example Output:**
        \`\`\`json
        {
          "CompanyName": "Hema Seeds Pvt Ltd",
          "VoucherNo": "HSPL/RV/KOHA/577/24-25",
          "Date": "12-01-2025",
          "Location": "Kohadia, Raipur, Chhattisgarh, Pincode: 492001",
          "ReceiverName": "Shakti Bag",
          "ReceivedFrom": "Mr. Shakti Bag",
          "Particular": "Shakti Bag Khd - 2710163 Adv. A/c",
          "Amount": 2000,
          "Remark": "An amount of INR 2000 (Rupees Two Thousand Only) has been returned in cash by Mr. Shakti Bag as an adjustment against the advance payment recorded in account number 2710163. This transaction is documented under voucher number HSPL/RV/KOHA/577/24-25 at the Kohadia, Raipur branch."
        }
        \`\`\`

        Now, process the following extracted text and return **only valid JSON**:
        """${extractedText}"""`;

        const response = await fetch(groq_url, {
          method: "POST",
          headers: {
            "Content-Type": "application/json",
            Authorization: `Bearer ${groq_api_key}`,
          },
          body: JSON.stringify({
            model: "llama3-8b-8192",
            messages: [{ role: "user", content: prompt }],
            temperature: 0,
          }),
        });

        const data = await response.json();

        document.getElementById("statusMessage").style.display = "none";

        if (data.choices && data.choices.length > 0) {
          try {
            let jsonString = data.choices[0].message.content.trim();

            // Extract JSON content correctly
            const jsonStartIndex = jsonString.indexOf("{");
            const jsonEndIndex = jsonString.lastIndexOf("}");
            if (jsonStartIndex !== -1 && jsonEndIndex !== -1) {
              jsonString = jsonString.substring(
                jsonStartIndex,
                jsonEndIndex + 1
              );
            }

            // Parse JSON safely
            const structuredJSON = JSON.parse(jsonString);
            console.log("Extracted JSON:", structuredJSON);
            document.getElementById("output").innerText = JSON.stringify(
              structuredJSON,
              null,
              2
            );
          } catch (err) {
            console.error(
              "Error parsing JSON:",
              err,
              data.choices[0].message.content
            );
            document.getElementById("output").innerText =
              "⚠️ Error parsing JSON response.";
          }
        } else {
          console.error("Invalid API response:", data);
          document.getElementById("output").innerText =
            "⚠️ Error: Invalid API response.";
        }
      }
    </script>
  </body>
</html>