YuliusBox

Privacy-First Web Tools
for Productivity.

A collection of free, client-side, and secure utilities. No ads, no tracking, just useful tools that respect your data.

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Screenshot Beautifier

Wrap your screenshots in a stylish browser window with gradients.

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HEIC to JPG Free

Convert HEIC/WebP photos to JPG instantly in your browser. 100% Local processing via WebAssembly.

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Bulk Image Compression

Compress unlimited JPG/PNG/WebP images locally. High efficiency, privacy-first, and 100% free.

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PDF Toolkit

Merge, Split, and Compress PDF files locally.

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Video to GIF

Convert MP4/MOV to animated GIF locally using FFmpeg WASM.

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Secure ID Watermarker

Add security watermarks to ID cards locally. Prevent unauthorized use.

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Local AI Transcription

Convert Audio (MP3/WAV) to text locally using OpenAI Whisper (WASM).

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Excel Formula Bot

Convert natural language to complex Excel/Google Sheets formulas instantly.

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Polite Email Paraphraser

Rewrite your emails to be professional, polite, and persuasive.

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AI Regex Generator

Generate and explain complex Regular Expressions using AI.

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JSON to Code

Convert JSON to TypeScript, Go, or Dart models instantly.

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AI SQL Builder

Generate optimized SQL queries from natural language.

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AI Cron Generator

Convert natural language to Cron expressions easily.

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Privacy & Terms

Generate standard legal documents for your apps instantly.

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Social Media Safe Zone

Preview TikTok/Reels/Shorts overlays to avoid blocked content.

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YouTube Title Optimizer

Generate viral, high-CTR titles and SEO tags with AI.

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Color Palette Generator

Extract perfect color palettes from any image instantly.

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AI Background Remover

Remove image backgrounds instantly in the browser. 100% Private.

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Image Resizer & Crop

Resize, crop, and convert image formats locally in your browser.

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Internet Speed Test

Check your internet ping, download, and upload speeds.

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Social Media Video Downloader

Extract and download videos from YouTube, TikTok, Instagram, Twitter, etc. without watermarks.

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Word to PDF Converter

Convert Word documents (.doc, .docx) to PDF format securely in the cloud.

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Excel to PDF Converter

Convert Excel spreadsheets (.xlsx, .csv) to PDF format securely in the cloud.

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PPT to PDF Converter

Convert PowerPoint presentations (.pptx, .ppt) to PDF format securely.

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URL to PDF Converter

Convert any public website or URL into a high-quality PDF document.

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Image Grid Joiner

Combine multiple images into a seamless grid instantly. 100% processing locally on your device.

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Image Grid Splitter

Split a single image into a grid of smaller pieces (e.g., 3x3). 100% local processing.

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I am building new tools every weekend.