What is File Compressor?
Batch-compress JPEG, PNG, WebP, GIF, BMP, and AVIF images with quality control, output conversion, and resizing. Optimize PDF structure locally in your browser.
Why creators use File Compressor
File Compressor is designed to help creators move faster with every stage of the content pipeline. Whether you are polishing a short-form video, extracting captions, generating hashtags, or converting media formats, this tool keeps your workflow inside the browser and avoids extra apps.
- Faster website load times
- Reduced storage usage
- Format flexibility
- Batch processing
- Privacy-safe — no uploads
Best use cases
Popular use cases include creator workflow optimization, rapid social video publishing, and preparing content for YouTube, Instagram, TikTok, and other channels.
Web Performance
Compress hero images and thumbnails to speed up page load and improve Core Web Vitals.
Social Media
Reduce image file sizes for Instagram, Twitter, or LinkedIn posts without visible quality loss.
Storage Saving
Bulk compress a photo library to free up disk space while maintaining visual quality.
Key features
This tool is built for speed, clarity, and precision. The work you create here is meant to be publish-ready, with direct export options and smart presets for the most common creator workflows.
- Image compression (JPEG, PNG, WebP, GIF, BMP, AVIF)
- PDF structure optimization
- Image quality slider 5–100%
- Image output format conversion
- Image max-width resize option
- Batch processing
- Per-file savings preview
- 100% local — no uploads
How File Compressor helps creators publish faster
File Compressor gives creators and developers local, batch processing for images and PDFs. Images support quality control, format conversion, and resizing; PDFs are optimized by rewriting their structure.
Upload images and PDFs, set the quality and output format for images, click Compress, review per-file size changes, then download files individually or all at once.
Best practices
- Start at 80% quality and reduce until the visual difference becomes noticeable.
- Use WebP output for web images — it delivers the best quality-to-size ratio of all formats.
Common mistakes to avoid
- Setting quality too low (below 50%) for portrait photos — faces show visible artifacts.
- Expecting PNG output to be significantly smaller — PNG is lossless; use JPEG or WebP for size reduction.
How to use File Compressor
Upload files
Click or drag and drop supported image files or PDFs into the drop zone.
Adjust image settings
For images, set quality (5–100%), choose output format, and optionally set a max width.
Compress & Download
Click Compress, see per-file savings, then download individually or all at once.
Creator tips
- Use 75–85% quality for social media images — virtually indistinguishable from originals.
- Convert PNGs to WebP for 30–50% smaller files with the same transparency support.
- Set a 1920px max width for web hero images to keep them crisp on all screens.
Unlike cloud compressors that upload your files to external servers, Seloice processes images with the Canvas API and optimizes PDFs locally in your browser.
Troubleshooting
Compressed file is larger than original
This can happen with PNG because PNG compression is lossless. Switch to JPEG or WebP output for smaller sizes.
GIF loses animation after compression
Canvas-based compression flattens GIF animation to a single frame. For animated GIFs use a dedicated GIF optimizer.
Frequently asked questions
Which file formats are supported?
Images in JPEG, PNG, WebP, GIF, BMP, and AVIF formats and PDF files are supported. Images can be output as JPEG, PNG, or WebP.
How are PDFs compressed?
PDFs are rewritten with optimized object streams in your browser. Existing embedded images are not recompressed, so size savings depend on the PDF.
Does image compression affect quality?
Lowering quality reduces file size at the cost of some detail. A quality of 75–85% is usually unnoticeable for photos. PNG compression is lossless.
Can I compress multiple files at once?
Yes. Add images and PDFs together, then process the batch in your browser.
Are my files uploaded to a server?
No. All compression and PDF optimization happen in your browser. Your files never leave your device.
More creator resources
Need more tips for creating viral content? Our blog shares creator workflows, caption formulas, hashtag strategies, and editing shortcuts that pair perfectly with this tool.