User Guide

Complete Tutorial

Master every tool on lancar.top — from paste sharing to media conversion and beyond.

lancar.top is an all-in-one online platform for paste sharing, file conversion, media processing, QR code generation, and more. Follow the guides below to master each tool.

Create & Share Paste

  1. Open the lancar.top home page and enter your text or code in the editor.
  2. Choose visibility (public/private), expiration time, and syntax highlighting language.
  3. Click "Create Paste" to generate a unique shareable link.
  4. Copy and share the generated URL. Recipients can view it instantly in the browser.

Image Compression

  1. Go to the Image Compressor tool from the navigation menu.
  2. Upload your image (JPG, PNG, or WebP). The tool shows original vs compressed size.
  3. Adjust the quality slider to control compression level, then download the optimized file.

Image Format Converter

  1. Open the Image Converter and upload your image file.
  2. Select the target format (PNG, JPG, WebP, or BMP).
  3. Click Convert and download the converted image. All processing happens in your browser.

PDF Tools

lancar.top provides multiple PDF utilities:

Document Converters

  1. Use "Word to PDF" to convert .docx files to PDF format.
  2. Use "Excel to PDF" to convert spreadsheet files (.xlsx) to PDF.
  3. Use "PPT to PDF" to convert PowerPoint presentations to PDF.
  4. Upload your file, wait for processing, and download the resulting PDF.

Media Tools (Audio & Video)

  1. Open Media Tools from the navigation. It uses ffmpeg.wasm for browser-based processing.
  2. Upload an audio or video file (MP4, AVI, MOV, MP3, WAV, etc).
  3. Select the target format and click Convert. No file is uploaded to any server.
  4. Download the converted file once processing completes. Use Chrome or Edge for best compatibility.

Video Watermark

  1. Go to Video Watermark and upload your video file.
  2. Choose text or image watermark type. For text, set content, color, and font size.
  3. Select the watermark position from the 7-point grid and adjust opacity.
  4. Preview the watermark overlay in real-time on the video, then click Process.

QR Code Generator

  1. Open the QR Code Generator from the tools menu.
  2. Enter a URL, text, or any data you want to encode.
  3. Customize colors and size, then download the QR code as PNG.

URL Shortener

  1. Navigate to the URL Shortener tool.
  2. Paste your long URL and click Shorten to get a compact link.
  3. Share the short URL — it redirects to the original address.

Tips & Best Practices

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