# File Lens > Compare text, JSON, CSV & XML files offline. Fast, private file comparison. Canonical page: [https://chrome-stats.com/d/com.gk.filelens](https://chrome-stats.com/d/com.gk.filelens) ## Overview - **ID:** `com.gk.filelens` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** GK Twin - **Category:** TOOLS - **Downloads:** 3 - **Version:** 1.0.0 - **Last updated:** 2026-08-12 - **First published:** 2026-08-12 - **Publisher country:** IN - **Size:** 23 MB - **Data as of:** 2026-09-05 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.gk.filelens) - **Website:** [https://gktwinapp.com/](https://gktwinapp.com/) - **Privacy policy:** [https://gktwinapp.com/privacy-policy](https://gktwinapp.com/privacy-policy) ## Description File Lens is the fast, private file comparison tool for developers - compare Text, JSON, CSV, and XML files right on your phone. See every change instantly, with desktop-grade clarity built for a mobile screen.

YOUR FILES NEVER LEAVE YOUR DEVICE
File Lens compares your files entirely on-device. No account, no cloud sync, no AI processing, and no backend server ever sees your content - your code, configs, and data stay private, even without an internet connection. The app is ad-supported to stay free; ads are the only network activity in the app, and they never have access to your files.

SUPPORTED FORMATS
• Plain text - line-by-line comparison with a proper comparison algorithm
• JSON - structural comparison, not just raw text, with JSON-path locations for every change
• CSV - row and column comparison, with optional key-column matching
• XML - structural comparison of elements and attributes, with XPath-style locations

POWERFUL COMPARISON ENGINE
• Choose between Myers or Patience comparison algorithms
• Clearly marked added, removed, modified, and unchanged lines
• Ignore-whitespace and ignore-line-ending options
• JSON pretty-printing with optional key-order normalization
• CSV delimiter auto-detection and header handling
• Malformed files never crash the app - they gracefully fall back to a plain text comparison

BUILT FOR PHONES
• Side-by-side view on tablets and wide screens, stacked view on phones
• Line numbers and horizontal scrolling for long lines
• Synchronized scrolling between File A and File B
• Collapse unchanged sections to focus on what matters
• Jump straight to the next or previous change

SEARCH & FILTER
• Search across both files at once, with case-sensitive and regex modes
• Jump between matches with next/previous navigation
• Filter the view to show everything, changes only, or just added, removed, or modified lines

EXPORT & SHARE
• Export the full comparison as TXT or a styled HTML report
• Export a quick summary of what changed
• Share results instantly using your phone's native share sheet

RECENT COMPARISONS
File Lens remembers your recent comparisons - file names, format, and summary stats - so you can pick up where you left off. History stays on your device and can be cleared anytime; file contents are never stored.

WHO IT'S FOR
Developers, QA engineers, and anyone who needs to quickly compare config files, API responses, log snippets, spreadsheets, or markup - without opening a laptop.

File Lens is a lightweight, privacy-first alternative to desktop file comparison tools, designed from the ground up for mobile. Download it now and see what changed in seconds. ## Rankings - #3,012,501 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_ADSERVICES_TOPICS` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.FOREGROUND_SERVICE` - `android.permission.INTERNET` - `android.permission.WAKE_LOCK` - `com.android.vending.CHECK_LICENSE` - `com.gk.filelens.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` - `com.google.android.gms.permission.AD_ID` ## Similar extensions and apps - [FileLens: File & Code Viewer](https://chrome-stats.com/d/com.esseg.filelens) — 16 users - [Compare Text](https://chrome-stats.com/d/org.comparetext.mobile) — 37 users - [RevisionLens](https://chrome-stats.com/d/com.clausebeam.revisionlens) - [FileLens: Inspect & Share](https://chrome-stats.com/d/app.com.filelens) — 59 users - [Minimal Diff - Offline Compare](https://chrome-stats.com/d/io.kogera.minimaldiff) — 43 users - [DiffText](https://chrome-stats.com/d/com.zanaxu.difftext) — 26 users - [Lite Diff Generator](https://chrome-stats.com/d/com.litediffgenerator) — 2 users - [Text Difference Finder](https://chrome-stats.com/d/com.textdiffer.finder) - [Lens - HTML Viewer](https://chrome-stats.com/d/com.agrizameen.lens) — 118 users - [PDF Compare: Diff & Changes](https://chrome-stats.com/d/compare.pdf) — 5,678 users - [Excel/JSON/XML Converter](https://chrome-stats.com/d/info.camposha.excel_json_xml_converter) — 1,800 users - [JSON Compare – Diff & Viewer](https://chrome-stats.com/d/com.jsoncompare) — 130 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.gk.filelens)