The Converters
Time Converter
Seamlessly convert across time zones and units like seconds, minutes, and hours.
Currency Converter
Calculate exchange rates instantly with up-to-date local currency data.
Length Converter
Switch between metric and imperial units like meters, feet, and miles.
Weight Converter
Quickly convert grams, kilograms, pounds, and ounces.
Temperature Converter
Translate degrees between Celsius, Fahrenheit, and Kelvin.
Area Converter
Calculate square footage, acres, hectares, and square meters.
Volume Converter
Convert fluid ounces, liters, gallons, and cubic meters.
Speed Converter
Switch between mph, km/h, knots, and meters per second.
Text Converter
Change text cases, encode, decode, or sanitize string formats.
Image Converter
Locally transform images between PNG, JPG, WEBP, and SVG.
Video Converter
Transcode video files between MP4, WebM, and MKV formats.
Audio Converter
Convert sound files across MP3, WAV, AAC, and OGG.
Document Converter
Turn DOCX and PPTX files into readable PDF formats locally.
File Converter
Change generic file extensions and handle basic format shifts.
Ebook Converter
Transform EPUB, MOBI, and AZW3 files for your favorite e-reader.
The Compressors
Image Compressor
Shrink PNG and JPG file sizes without losing visual quality.
PDF Compressor
Reduce PDF document weight by optimizing internal streams.
Video Compressor
Compress MP4 and WebM videos using client-side WebAssembly.
Audio Compressor
Lower audio bitrates to save space without crushing quality.
File Compressor
Pack multiple standard files into a single, optimized ZIP archive.
Document Compressor
Strip bloated metadata and resize embedded images in Office files.
Archive Compressor
Re-evaluate and maximize compression on existing ZIP archives.
The Generators
Lorem Ipsum Generator
Create clean, customizable placeholder text for your mockups.
Password Generator
Generate secure, cryptographically randomized passwords locally.
QR Code Generator
Instantly create scannable QR codes for URLs, WiFi, and contacts.
Barcode Generator
Build standard barcodes like UPC, EAN, and Code128 natively.
Font Generator
Create stylish unicode text variations for social media profiles.
Gradient Generator
Design beautiful CSS linear and radial gradients with live previews.
Mock Data Generator
Export dummy JSON or CSV data tailored for database testing.
Random IP Generator
Generate random IPv4 and IPv6 addresses for network simulations.
Fake Email Generator
Create temporary or dummy email addresses for form testing.
Fake Phone Generator
Generate formatted dummy phone numbers for UI validation.
Sudoku Generator
Build printable, randomized Sudoku puzzles at various difficulties.
Maze Generator
Generate and export complex SVG mazes with custom routing.
Other Tools
Color Format Converter
Translate values seamlessly between HEX, RGB, HSL, and CMYK.
Webpage Capture
Render HTML/CSS directly to PNG, JPG, or PDF formats safely.
Image Resizer
Batch scale and resize images dynamically within the browser.
Regex Tester
Evaluate regular expressions in real-time with syntax highlighting.
Image Watermarker
Stamp text or logo overlays onto your images with opacity control.
Base64 Encoder
Encode and decode raw strings or files into Base64 format.
Why Sattive Dev Labs?
We eliminated the server. Everything happens on your machine.
Absolute Privacy
Your files never leave your device. We don't have servers to store your data even if we wanted to.
Zero Upload Time
Stop waiting in server queues. Because processing happens in your browser, it starts instantly.
Powered by WASM
We utilize WebAssembly to run desktop-grade C++ and Rust processing engines directly in your browser tab.
Frequently Asked Questions
Can I use these tools offline?
Yes. Once the page and its scripts have loaded in your browser, you can completely disconnect from the internet and continue compressing and converting files.
Why did my browser crash on a massive file?
Because everything happens in your local RAM rather than a remote server. Browsers strictly limit how much memory a single tab can use. For multi-gigabyte files, use native desktop software.