TXT Tab Editor: Large TXT File

Manyu Lab LLC.

About this app

Open and edit multiple TXT files and notes with smooth multi-tab switching! A professional, high-performance text editor built for large files.

Frustrated with mobile text apps freezing, lagging, or crashing when opening large files? Tired of switching back and forth between apps to compare plain text documents?
TXT Tab Editor is a powerful, lightweight multi-tab text editor and notepad engineered for speed, stability, and productivity. From large server logs and source code to creative drafts and daily notes, experience smooth, lag-free plain text editing right in your pocket.

✨ Key Features & Highlights

📑 1. True Multi-Tab Workspace
• Simultaneous Multi-Document Editing: Open and switch between multiple TXT files and quick notes using tabs, just like a desktop web browser.
• Open via External Apps: Seamlessly open .txt files from your file manager, cloud drive, or chat apps directly into a new tab.

⚡ 2. Ultra-Fast Large File Engine & Zero Lag
• Active-Window Viewport Architecture: Effortlessly opens and scrolls through massive text files and system logs without Out-of-Memory (OOM) crashes or typing delays.
• Smart Word Wrap: Reads smoothly without awkward horizontal scrolling, formatting text naturally to fit your screen width.

🔍 3. Precision Search & Replace
• Real-Time Match Highlighting: Instantly highlights search matches with real-time match counters as you type.
• Navigation & Batch Replace: Jump smoothly to previous/next occurrences and replace single matches or all occurrences in one click.

🔢 4. Dynamic Line Numbers & Go to Line
• Accurate Line Numbering: Dynamic line indexing keeps line counts synchronized, even when long lines wrap across multiple visual rows.
• Go to Line Navigation: Jump straight to any specific line number in seconds, making log reviews and code inspections painless.
• Copy Line Range: Specify start and end lines to copy targeted text sections directly to your clipboard without tedious dragging.

🛡️ 5. Read-Only Lock Mode & Smart Undo/Redo
• One-Tap Viewer Lock: Toggle the padlock icon to switch into read-only mode, protecting your critical documents from accidental edits or deletions.
• Context-Aware Undo/Redo: Fine-tuned debounce tracking preserves your natural typing flow and accurately restores cursor positions.

🎨 6. Monospace Font & Visual Customization
• Monospace Font Support: Switch to clean monospace fonts for optimal code, log, and tabular data readability.
• Precise Font Size Scaling: Adjust text size from 10sp to 32sp to suit your reading preference.
• 12 Theme Colors & Dark Mode: Fully supports system dark theme and personalized color palettes to protect your eyes during night sessions.

💾 7. Seamless TXT ↔ Note Conversion & Backups
• Save TXT as Note: Instantly save open file contents into the app's internal database with one tap.
• Export All Notes to Single TXT: Consolidate and export your entire collection of notes into a single TXT file anytime.
• Cloud & Local Backups: Safeguard your notes with Google Cloud backup and local JSON export/import.

🔒 8. 100% Offline & Private
• Functions entirely offline with zero mandatory internet permissions.
• No account registration or external tracking. Your data stays strictly on your personal device.

🎯 Ideal For:
• Developers, sysadmins, and IT pros checking large server logs, scripts, and error files on mobile.
• Writers, students, and journalists managing multiple text drafts and research notes side-by-side.
• Anyone needing a reliable, responsive plain text viewer that handles heavy documents without stuttering.

Download TXT Tab Editor today and discover the ultimate lightweight, multi-tab text editing experience!

What’s new

* Added an option to show or hide the title field for new documents (configurable in Settings).
* Improved layout alignment and placeholder display for editor title and content fields.
* Cleaned up the top bar layout to provide better visual spacing.
* Enhanced tab titles for untitled notes to dynamically display the first line of content.
* Prevented saving empty notes (notes with no title and no content).
* Improved stability and file handling for 0-byte empty files and tab restoration.