Giant JSON Viewer

Giant JSON Viewer

High-Performance JSON Viewer for Android

Engineered for developers and data analysts who need to inspect huge JSON files on the go. While standard market viewers crash on files larger than 50MB, Giant JSON Viewer reliably handles multi-hundred megabyte files and has been tested with files up to several gigabytes.

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Why Giant JSON Viewer?

Massive File Support

Uses advanced streaming techniques to open files far exceeding the Android RAM limit.

Smart Indexing

Builds a rapid-access index on first open. Once indexed, even multi-gigabyte files open with minimal loading time.

High Performance

Navigate through millions of lines rapidly with optimized rendering and memory management.

Data Reliability

Built for stability, ensuring critical data is always accessible offline.

Three Specialized Viewing Modes

Text Mode Raw Viewer
Text Mode with syntax highlighting

A high-performance raw text viewer optimized for log analysis and deep search operations. Supported for JSON, NDJSON, and Plain Text.

  • Advanced Search: Use Regex or standard search to find data instantly
  • Occurrence Counter: Efficiently count matches across the entire file
  • Long Line Handling: Detects extremely long lines and offers options to truncate or hide them
  • Syntax Highlighting: Color-coded syntax for JSON readability
  • Persistent Highlights: Mark specific terms to track them as you scroll
  • GenAI Regex Helper: Describe your search intent in natural language, and the AI generates the precise Regex pattern
Browser Mode Tree Viewer
Browser Mode tree view with bookmarks

An interactive hierarchical view designed for navigating deeply nested structures like API responses. Supported for JSON and NDJSON.

  • Bookmarks: Save deep paths to revisit later
  • Hidden Paths: Hide irrelevant fields to focus on the data that matters
  • Sibling Navigation: Quickly jump between adjacent objects in an array
  • Breadcrumbs: Track your exact location in the JSON hierarchy
  • Jump to Path/Index: Full JSONPath syntax support or jump directly to specific array indices
  • Infinite Scrolling: Seamlessly navigate through arrays with millions of items
Structure Mode Schema Viewer
Structure Mode interactive graph

A "bird's eye view" visualization of your JSON schema, essential for understanding the shape of unfamiliar data. Supported for JSON and NDJSON.

  • Interactive Graph: Visualize your JSON structure as a zoomable, pannable tree diagram
  • Schema Analysis: Analyze key types and hierarchy without loading values
  • Visual Export: Save the structure graph as a high-resolution PNG image
  • Schema Export: Generate TypeScript interfaces or JSON Schema (Draft-07) definitions

Advanced Data Analysis

Graphical Query Builder with AND/OR logic

Graphical Query Builder (Smart Filter)

Designed for speed and ease of use, the Browser Mode features a powerful visual query builder.

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Visual Logic

Build complex queries using a graphical interface with nested logic (AND, OR, Parentheses)

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No Code Required

Select keys, operators (Equals, Contains, Regex, etc.), and values from dropdowns

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Instant Re-use

Every filter run is cached as a "smart index". Re-applying a previous filter on a massive file is instant.

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Export Results

Export the filtered dataset directly to JSON, CSV, or SQL

Dedicated Tools

Quick-access utilities available directly from the Recent Files menu

Unescape JSON

Clean up stringified JSON strings (removing backslashes) to perform analysis

Just Make Pretty

A simple tool to format/beautify JSON text without opening the full viewer

Schema Validation

Validate your JSON content against a standard JSON Schema (Draft-07)

Data Conversion & Export

Transform your JSON data into compatible formats for analysis

Customizable Export

Select specific keys to include and rename fields during the export process

SQL Analyzer

Analyzes records to automatically detect column types and schema for SQL export

SQL Export

Generate INSERT statements for SQLite, MySQL, PostgreSQL, SQL Server, Oracle, and MariaDB

CSV Export

Flatten extracted data into spreadsheet-compatible CSV files

Supported Formats

JSON
NDJSON
Plain Text

Standard, Minified, and Large-Value JSON files supported

Support Indie Development

We are solo developers and this project is our baby. We have engineered it from the ground up to handle data scales that others said were impossible on mobile.

We invite you to give it a try! If you enjoy using Giant JSON Viewer, please support us by leaving a review on Google Play.

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