JSON Viewer, Editor & Opener

Open, view and edit JSON on Android with a complete offline JSON file opener, formatter, validator, repair tool and converter. JSON Viewer, Editor & Opener is built for developers, testers, students, analysts and anyone who works with JSON, JSONC or JSON Lines files on a phone or tablet. Your documents stay on your device. No account, cloud upload or server processing is required. Open & create JSON files Open JSON files from your device, Recent files or another app using Open with and Share to. You can also: • Create a new JSON object • Create a new JSON array • Paste JSON from the clipboard • Resume unsaved work • Open recent documents Supported formats: • JSON • JSON with comments (JSONC) • JSON Lines (.jsonl) • NDJSON Edit JSON in 3 views Code view • Syntax highlighting • Line numbers • Bracket matching • Undo and redo • Pretty-print JSON • Minify JSON • Sort keys Tree view • Expand and collapse objects and arrays • Edit values and rename keys • Add, remove, move or duplicate nodes • Copy values and JSONPath locations Table view • Sort columns • Filter data • Choose visible columns • Edit cells • Inspect rows on tablets Code, Tree and Table views share one undo history. Validate & repair JSON Live JSON validation shows the exact line and column of errors. Diagnostics can identify: • Invalid JSON syntax • Duplicate keys • Comments inside strict JSON • Number precision issues • Common structure errors Repair common mistakes such as: • Trailing commas • Single quotes • Missing commas • Comments Review suggested fixes before applying them. You can also convert JSONC to strict JSON or parse JSON embedded inside a string. Search & replace • Search keys and values • Regular expressions • Case-sensitive search • Whole-word search • Jump between matches • Replace text Compare JSON Compare two documents or compare your current edits with the saved file. • Added values • Removed values • Changed values • Tree differences • Side-by-side differences on supported tablet layouts JSON formatter • 2-space indentation • 4-space indentation • Tab indentation • Pretty print • Minify • Sort keys • Validate syntax JSON converter JSON to: • CSV • TSV • YAML • XML • TOML • JSON Lines • PDF To JSON: • CSV • TSV • YAML • XML • TOML Merge & split JSON • Merge several files into one JSON array • Split large JSON arrays into smaller files • Choose the size of each split • Save results to a folder you choose JSONPath, JMESPath & JSON Schema • JSONPath queries • JMESPath queries • JSON Schema validation Transform JSON • Sort data • Flatten JSON • Remove empty values • JSON Patch • Merge Patch Generate model code Create model code from sample JSON for: • Java • Kotlin • Swift • TypeScript • Python • Go Decode & inspect data • JWT • Base64 • URL encoding • Hashes • Sample JSON generator • Tree bookmarks Large JSON file viewer Files that are too large for normal editing can open in a dedicated read-only viewer. • Lazy JSON tree • Search across the file • Show search results in Tree • Raw JSON view • JSON Lines record list • Save one record or search results to a smaller file Large-file limits depend on your device and available memory. Safe editing & recovery Drafts are saved while you work so unsaved changes can be recovered after the app closes or an unexpected interruption occurs. Saving protects the original while the new copy is written and checked. Private & offline • No account required • No cloud required • No document uploads • Local JSON processing Phone & tablet support • Phone-friendly editor • Tablet layouts • Landscape support • Light theme • Dark theme • Follow system appearance Open your JSON file and start viewing, editing, validating, repairing, comparing and converting your data today.