Compression Toolkit — Complete Guide
This page collects the guides for 5 tools in one place. Pick a tool name from the list and its guide opens beside it, so there is no page to navigate to and no account to create.
Image Compressor
Compress JPG, PNG, WebP, GIF, BMP and TIFF images in the browser with a real quality dial and optional downscaling.
How to use it
- Choose a JPG, PNG, or WebP image.
- Move the quality slider down until the file size fits your limit.
- Download and open the result at full size to check for artifacts.
- If it looks bad, move the slider back up and try again.
Use cases
- Shrinking a screenshot to fit under an upload limit.
- Reducing page weight by compressing images for a website.
- Making a photo small enough to email without re-uploading.
Limitation — Re-encodes with lower quality to shrink the file; the visual difference grows as quality drops, and the tool never upscales or adds pixels.
PDF Compressor
Drop unused objects and recompress every stream in a PDF. Reports the real saving, even when it is small.
How to use it
- Paste the text into the input area.
- Choose the available operation or settings.
- Apply the operation and copy the result.
Limitation — Check the input and result before relying on this tool for important work.
Audio Compressor
Shrink MP3, WAV, M4A and FLAC audio with a target bitrate per output format. Runs on FFmpeg in the browser.
How to use it
- Paste the text into the input area.
- Choose the available operation or settings.
- Apply the operation and copy the result.
Limitation — Check the input and result before relying on this tool for important work.
Archive (ZIP) Compressor
Shrink a ZIP by recompressing the photos inside it, which is where the real weight sits. Never returns something larger.
How to use it
- Paste the text into the input area.
- Choose the available operation or settings.
- Apply the operation and copy the result.
Limitation — Check the input and result before relying on this tool for important work.
Document Compressor
Repack DOCX, XLSX and PPTX tighter without touching a single byte of the document content inside.
How to use it
- Paste the text into the input area.
- Choose the available operation or settings.
- Apply the operation and copy the result.
Limitation — Check the input and result before relying on this tool for important work.
All Loonix tools process your input in the browser: text you type and files you pick never leave your device. Anything downloaded from the internet — say the FFmpeg runtime — is a supporting binary, not your data.
