TailIQ Lens — Large XML & JSON Viewer

Quickly open, search, and format large XML and JSON files.

TailIQ Lens is a local-first browser extension for viewing large XML, JSON, JSONL, and NDJSON documents. Open a file or paste data to inspect, search, transform, and download structured content without uploading it. Key features: • Open XML, JSON, JSONL, and NDJSON files, or paste data directly • Browse large documents in a virtualized tree view • View the original source text • Search names and values • Expand or collapse tree structures as needed • Format or minify content and download the transformed copy • Use structured advanced search in Plus to locate paths, node names, values, types, and XML attributes Free and Plus: • Free supports files up to 10 MB and includes tree view, source view, basic search, formatting, minification, and download • Plus opens files up to 100 MB and adds structured advanced search • Plus includes line and node annotations, portable notes files, and offline annotation reports. Source preview has a separate input limit: 8 MB by default, configurable up to 20 MB. Formatted-source annotations and exports require an available preview; preview output and reports also have safety limits • Plus Compare shows two same-type XML or JSON files side by side, with formatted source, line numbers, difference navigation, and an offline HTML report. Each input is limited to 25 MB, and each formatted result to 96 MB Updating does not delete or upload your local files. The current Free and Plus limits apply when files are opened or processed. Plus is purchased securely on the TailIQ website through Paddle. Sign-in uses a one-time email link, so TailIQ does not store an account password. Each Plus purchase or subscription applies to one product and supports up to 3 active browser installations. Old installations can be revoked from the TailIQ account page. Current plans range from US$4.99 per month to US$39.99 for 365 days. Mainland China local prices range from CNY 15 per month to CNY 99 for 365 days; a non-renewing 30-day option is also available. Current prices and renewal terms are shown before purchase. Billing can be managed or canceled through Paddle's customer portal. A full refund may be requested within 14 days of an initial purchase or an accidental renewal, except in cases of suspected fraud or abuse. Mandatory local law takes priority. Full policy: https://apps.tailiq.com/refund Privacy and security: File contents are processed locally inside the extension and are not uploaded to TailIQ or any third party. TailIQ Lens contains no advertising, analytics, browsing-history access, website-content access, or remotely executed code.