All-in-One Developer
& Design Toolbox
Free, fast, and private — every tool runs entirely in your browser. No signup, no uploads, no limits.
Android Utilities
GIF to Boot Animation
Convert any GIF into a ready-to-flash Android bootanimation.zip
→Boot Animation Preview
Preview Android boot animations in your browser
→APK Version Info Extractor
Extract package name, version, and details from an APK
→Android Manifest Viewer
View and analyze AndroidManifest.xml files online
→ADB Command Generator
Generate common Android Debug Bridge (ADB) commands
→Video to Boot Animation
Convert video directly into Android bootanimation.zip
→Image & Media Utilities
GIF to Boot Animation
Convert any GIF into a ready-to-flash Android bootanimation.zip
→Image Converter
Convert between PNG, WebP, JPG formats
→Image Compressor
Reduce image file size without losing quality
→Video to GIF
Convert MP4, WebM, and other videos to GIF animations
→GIF to Video
Convert GIF animations to MP4 videos
→Video to Boot Animation
Convert video directly into Android bootanimation.zip
→Video Converter
Convert videos between MP4, WebM, MOV, and AVI locally
→Video Compressor
Compress video files to reduce size locally
→Developer Tools
JSON Formatter
Format and beautify JSON data with syntax highlighting
→JSON Validator
Validate JSON syntax and find errors
→Markdown Preview
Write Markdown and preview it live
→CSS Minifier
Minify CSS code to reduce file size
→Regex Tester
Test regular expressions with live matching
→Text Diff Checker
Compare two texts and highlight differences
→Text, Encoding & Utility
Base64 Encoder/Decoder
Encode or decode Base64 strings instantly
→Word Counter
Count words, characters, sentences and paragraphs
→Lorem Ipsum Generator
Generate placeholder text for designs
→URL Encoder/Decoder
Encode or decode URL strings
→Timestamp Converter
Convert Unix timestamps to dates and vice versa
→Case Converter
Convert text between upper, lower, title case
→HTML Entity Encoder
Encode special characters to HTML entities
→PDF Utilities
Convert from PDF
Convert PDF to Word, Excel, Images, and more.
→Convert to PDF
Convert Word, Excel, Images to PDF.
→Merge & Split
Merge, split, extract, and arrange pages.
→Compress & Optimize
Reduce file size and optimize for web.
→Edit & Annotate
Add text, shapes, highlights, and whiteout.
→Security & Signatures
Passwords, encryption, and signatures.
→Formatting & Layout
Crop, resize, headers, footers, watermarks.
→Extract Data & Metadata
Extract images, links, edit metadata.
→Complete Tool Directory
Why Choose SJ Creation Tool Box?
SJ Creation Tool Box is not just another online tool website. We built every tool from the ground up with three principles that set us apart from competitors: absolute privacy, zero cost, and professional-grade results. While most online PDF tools upload your files to remote servers for processing, our tools run entirely within your web browser using advanced JavaScript libraries. This architectural decision means your confidential contracts, medical records, financial statements, and personal documents never leave your device.
100% Private
Files never leave your device. Zero server uploads. Verify in DevTools Network tab.
Completely Free
No subscriptions, no premium tiers, no per-file charges. All 160+ tools, unlimited use.
No Account Required
Start using any tool immediately. No signup, no email, no personal data collected.
Works Offline
Once loaded, tools work without internet. Process sensitive files on airplane mode.
Professional Quality
Built with industry-standard libraries: pdf-lib, pdf.js, FFmpeg.wasm, SheetJS.
Mobile Friendly
Every tool works on phones, tablets, and desktops. Responsive design adapts to any screen.
How It Works
Using any tool on SJ Creation is straightforward and takes just three steps:
- Choose a tool — Browse by category or use the search bar (Ctrl+K) to find exactly what you need from our collection of 160+ utilities.
- Upload or input your data — Drag and drop files into the upload zone, or paste text directly into the input field. Supported formats are listed on each tool page.
- Process and download — Click the action button and your result is ready in seconds. Download the processed file or copy the output to your clipboard.
The entire process happens locally. If you open your browser's Network tab in Developer Tools while processing a file, you will see zero upload requests. This is verifiable proof that your data stays on your device.
Tools for Every Need
Whether you are a student merging research papers, a developer formatting JSON payloads, a designer converting image formats, or a business professional compressing PDFs for email, SJ Creation has the right tool. Our collection spans seven major categories:
- PDF Tools (127) — The most comprehensive free PDF toolkit on the web. Merge, split, compress, convert, edit, protect, annotate, and format PDF documents without uploading them anywhere.
- Image Tools — Convert between PNG, JPG, WebP, and BMP. Compress images for web performance. All processing uses HTML5 Canvas for high-quality results.
- Video Tools — Convert video formats, create GIFs from video clips, compress video files, and generate Android boot animations. Powered by FFmpeg.wasm for professional codec support.
- Developer Tools — JSON formatter and validator, Base64 encoder, regex tester, CSS minifier, diff checker, URL encoder, UUID generator, and more utilities developers use daily.
- Text Tools — Word counter, case converter, Lorem Ipsum generator, and markdown preview for writers, editors, and content creators.
- Security Tools — SHA-256 hash generator, password generator with strength meter, and PDF encryption tools for securing your data.
- Android Tools — Boot animation creator, APK analyzer, manifest viewer, and ADB command reference for Android developers and enthusiasts.
Technology Behind the Tools
We use battle-tested open-source libraries that power production applications worldwide. PDF operations use pdf-lib (used by thousands of companies) for manipulation and Mozilla's pdf.js for rendering and text extraction. Video processing leverages FFmpeg.wasm, the WebAssembly port of the industry-standard FFmpeg multimedia framework. Spreadsheet generation uses SheetJS, the same library used in enterprise data pipelines. Every library is loaded locally from our servers — no third-party CDN dependencies during processing.
Frequently Asked Questions
Are these tools really free? What's the catch?
Yes, completely free with no limits. The site is supported by display advertising through Google AdSense. There are no premium tiers, no per-file charges, and no feature restrictions. Every user gets the same full access.
How do I know my files are not being uploaded?
Open your browser's Developer Tools (F12), go to the Network tab, and process a file. You will see zero upload requests. The processing happens entirely in JavaScript within your browser's sandbox environment.
What browsers are supported?
All modern browsers: Chrome, Firefox, Safari, Edge, Opera, and Brave. Mobile browsers on iOS and Android are fully supported. We recommend keeping your browser updated for the best performance.
Is there a file size limit?
The limit depends on your device's available RAM, not our servers. Most modern devices handle files up to 100-200MB without issues. For very large files, ensure you have sufficient free memory and close unnecessary tabs.
Can I use these tools for commercial purposes?
Yes. There are no restrictions on how you use the output files. Process client documents, create business materials, or integrate into your workflow without any licensing concerns.
Do tools work offline?
Yes. Once a tool page is fully loaded, all processing works without internet connection. The service worker caches core assets for offline availability. This makes SJ Creation ideal for working with sensitive documents in restricted network environments.