Panna PDF Tools

Edit PDF text in its own font, erase for real, sign, and turn ChatGPT or LaTeX maths into a PDF. Free, and your file never leaves your device.

Panna is TestoZa’s free set of PDF tools at pdf.testoza.com. It edits the existing text of a PDF in the document’s own font, deletes erased text from the file, and turns ChatGPT, Gemini or LaTeX maths into a clean PDF. Everything runs in your browser, so files are never uploaded, and there’s no sign-up or watermark.

The tools

Edit PDF: Change existing text in the PDF’s own font, erase for real, sign, highlight and organise pages.
Edit Hindi PDF: Edit Hindi forms and documents with matras and conjuncts shaped correctly, and keep the text searchable.
LaTeX to PDF: Paste a LaTeX document or maths and download a clean, paged PDF with selectable text.
ChatGPT to PDF: Save ChatGPT, Gemini or Claude answers as a PDF with every equation intact.

Last updated 2026-11-01.

All TestoZa docs

Start with TestoZa

Quick Start: Conduct a Test: Conduct an online test on TestoZa, step by step: make it from a PDF, photos or by typing, tap Conduct exam, share the link or a 6-digit join code, then read the results.
Introduction: Get started with the TestoZa question creator and doc formatting tools.
Bulk Test Upload: Learn how to format and upload massive tests in bulk using JSON formats.
Solution Upload Guide: Learn how to format and bulk upload detailed step-by-step solutions for tests.
AI Test Generation: Understand how to harness AI models to auto-generate complete tests from text, PDFs or images.

Platform Overview

Live Exams with a Join Code: Let candidates join with a 6-digit code: a quick code for any live exam, or a full exam room with candidate lists, PINs, a live monitor, rank lists and report cards.
Conduct Exams: Step-by-step guide with screenshots on how to activate, configure, and conduct exams on TestoZa.
Understanding Results: Read every number on the Results panel, the Full report and All submissions: who wrote, ranks, each answer sheet, what to teach again, and the Excel file.

Free PDF Tools

Panna PDF Tools: Edit PDF text in its own font, erase for real, sign, and turn ChatGPT or LaTeX maths into a PDF. Free, and your file never leaves your device.

JSON Schema Reference

Standard Test Format: Complete JSON reference for single-section flat tests.
Section-wise Format: JSON format schema for JEE, NEET and multiple sections exams with attempt controls.
Solutions JSON Format: JSON format reference for mapping detailed answers and explanations to question IDs.

Formatting & Syntax

Chemistry (mhchem): Chemical equations, redox reactions, equilibrium arrows, radioactive decays, skeletal organic structures.
Mathematics (KaTeX): Definite integrals, summations, fractions, limits, matrices, binomial equations.
Tables & LaTeX Arrays: Convert visual grids and matrix equations into professional KaTeX arrays.
Match Column System: Format double list column match questions using LaTeX array formatting.

AI Extractor Prompts

AI OCR Parsing Prompt: Complete prompts and backslash escape instructions for Gemini / ChatGPT parsers.
Multi-Section OCR Prompt: Optimized prompt for extracting multi-section papers with marking overrides.
Solutions OCR Prompt: Specialized prompt to OCR scan step-by-step solutions.