Large files
Free opens files up to 10 MB; Plus expands the limit to 100 MB. Parsing runs in a Web Worker and the interface renders only visible nodes and source lines.
TailIQ product
TailIQ Lens
Built for large XML and JSON files
Open XML, JSON, JSONL, and NDJSON, inspect structure in a virtualized tree or source view, search content, and download formatted or minified copies.
Product tour
Open XML, JSON, JSONL, and NDJSON files up to 100 MB with Plus
1 / 5
Screenshots follow your selected website language. Plus feature availability depends on your installed extension version and plan.
Clear search
Basic search covers names, attributes, and values. Advanced expressions narrow results by path, type, and field.
Flexible inspection
Tree structure, node details, source text, expansion depth, and theme preferences support different inspection tasks.
Local toolchain
Formatting, minifying, and downloading happen in the browser without uploading files to a remote service.
Annotation workflow
Plus adds line and node marks, editable notes, portable notes files, fast mark navigation, and self-contained offline HTML reports.
Side-by-side comparison
Plus shows complete locally formatted source with real line numbers, synchronized navigation, a global difference overview, and a self-contained report.
Clear boundary
Product boundary
TailIQ Lens is a viewer, search, and formatting tool—not a full IDE, database client, or schema-validation platform. It prioritizes fast opening and clear interaction for large structured files.
Contact support