Browse compressors by format
How your files are processed
Files are uploaded and processed on our servers, then made available for download.
What this tool does
Each compressor profile keeps the same file family—ZIP, MP4, PDF, JPEG, and so on—while trimming bytes.
Choose the row that matches your extension, set quality or level if the form offers it, then fetch the smaller download from the job page.
- Attachments under the limit — SMTP gateways often stop near 20–25 MB. Run the matching PDF or ZIP profile first, then attach. Keep presets mild when reviewers must zoom fine print.
- Faster web delivery — Hero images and short clips get lighter after one tuned quality pass. Match each social network’s bitrate hints instead of one extreme preset for every export.
- Cold storage packing — Higher DEFLATE or Zstd levels trade CPU time for smaller archives. Keep an untouched master if you might re-edit lossy media later.
How to use the file compressor?
- Pick a compressor — choose the profile that matches your file type (ZIP, JPEG, MP4, PDF, and more).
- Upload — add your file and adjust options such as quality or compression level when available.
- Download — collect the optimized file from the job page after processing.
Why use the file compressor?
Reach for compression when the format is fine but the size blocks email, LMS uploads, or phone sync.
Converters change extensions; this flow does not. It only tightens archives, lowers lossy quality, or squeezes lossless packing. Account limits match our other hosted tools.
When compression helps most
- Fit a grant PDF under a city portal’s megabyte cap.
- Upload phone MP4 homework under Canvas without switching codecs.
- Ship nightly log bundles compressed with Zstd to spare NAS space.
- Serve JPEG galleries at screen resolution instead of print DPI.
- Sync a lighter EPUB to Kindle over hotel Wi‑Fi.
- Archive FLAC listening copies when laptop SSD space runs low.
- Ship ZIP proofs through Slack when VPN drops stall Salesforce uploads.
Will compression hurt quality?
How much you notice depends on the codec and how far you move sliders.
Lossy JPEG and video discard detail you may see when zooming or re-editing. Lossless archives change on-disk size, not the expanded pixels or waveforms.
How online compression works
What your file contains
Many uploads still carry slack: verbose ZIP tables, huge embedded rasters, or generous media bitrates. Those bytes burn time on slow links and bounce against strict attachment rules.
What we change
Workers adjust settings inside the format—DEFLATE depth, JPEG coefficient tables, video bitrate targets—without renaming the extension. Players and editors should still open the result the same way.
Aggressive lossy presets shrink more but can show banding, duller audio, or softer video.
Milder steps stay safer for review copies. True lossless modes (PNG effort, FLAC) mostly reorder bits; decoded pixels or PCM stay identical.
Troubleshooting
- Already-optimized files may not shrink much: many inputs are already compressed.
- For lossy formats, stronger compression can reduce quality: start conservative and compare the download.
- Unsupported formats: pick a compressor profile that matches your extension; if it is not listed, use a converter first.
- Large files take longer to process and may exceed limits: try a smaller sample or split large archives.