Which compressor tool do I need?
What are compressor tools?
A file compressor makes a file take up fewer bytes while keeping it usable. This hub gathers 22 of them in one place: general image and JPEG compressors, a PNG colour reducer, fixed-target tools from 10 KB up to 500 KB, PDF compressors with KB targets, Office compressors for DOCX, PPTX and XLSX, and a ZIP archiver for mixed files.
The problems they solve are everyday ones. An exam portal rejects a 3 MB photo. An email bounces because the attachment is over the limit. A slide deck is too heavy to share, or a website crawls because its pictures are huge. In each case you need to reduce file size without wrecking the content, and ideally without sending private documents to a stranger's server.
How compressor tools work
Every compressor works in one of two ways. Lossless compression finds repetition and writes it more compactly, so the original can be rebuilt bit for bit. ZIP archives and PNG files both rely on this approach. Lossy compression goes further by discarding detail people are unlikely to notice, which is how JPEG and WEBP photos reach a fraction of their original size.
Choosing the right method matters more than the setting. Text files, CSVs and logs often shrink by 70–90% in a ZIP, while photos, MP4 videos and most PDFs barely change, because they are already compressed inside. For those you have to re-encode the content itself: lower the JPEG quality, cut a PNG down to a 256-colour palette, or resample the pictures embedded in a PDF or Word file. When you compress image and PDF files this way, text and layout stay as they were and only the pictures get lighter.
Exact KB targets work by searching. The tool tries a quality, measures the result and narrows in on the highest setting that still fits, reducing dimensions only if quality alone is not enough. It all runs on your device, so nothing is sent to a server.
Key features of our compressor tools
Free runs every day
Every compressor on this page is free and adds no watermark. You get free runs every day, more once you create a free account, and a batch of files counts as one run. Batch tools accept many files at once and hand them back as one ZIP.
Lands just under your limit
Target-size modes search for the best quality that still fits, so a 50 KB requirement gives you a file just under 50 KB, not a needlessly blurry 31 KB one. PDF compression keeps text as text, and the Office compressors leave content and formatting untouched.
Results in a second or two
There is no server queue or round trip, so most photos and PDFs finish in a second or two. Big scanned PDFs, heavy Office files and long batches take longer, and older phones are slower, because the work runs on your own processor.
Any modern browser
The compressors work in up-to-date versions of Chrome, Edge, Safari and Firefox, on Windows, macOS, Linux, iPhone, iPad or Android. Pick files from a camera roll, drag them onto the page or paste an image with Ctrl or Cmd+V. You can also install the site as an app from the browser menu.
Keyboard and screen reader ready
Every button and field has a label, controls work with Tab and Enter, and a live region reads progress aloud to screen reader users. Nothing is timed, the layout holds up at high browser zoom, and a dark mode toggle is available.
Files never leave your device
Compression runs inside your browser tab, so photos, ID scans, contracts and spreadsheets never leave your device. Open the developer tools and watch the network tab to confirm it. After the page loads, the tools carry on working if your connection drops.
What makes EZCompressor's compressor tools different
Exact size targets for forms
Instead of guessing with a slider, you can type the limit an upload form states, from tiny signature files to 5 MB print images, and get a file that fits. Ready-made pages for 10, 20, 30, 50, 100, 200 and 500 KB save even that step.
Office files, not just photos
Few online tools compress DOCX, PPTX and XLSX files. These ones open the document package, recompress the pictures inside and re-pack it with maximum ZIP compression, so you get the same document back, only lighter.
Never larger than the original
If re-encoding would make a file bigger, which can happen with images that are already well optimised, the image compressors keep your original instead of handing you a worse result. You always see the before and after sizes.
Honest about what will shrink
The ZIP tool explains that photos, videos and PDFs barely shrink inside an archive and points you to the right compressor instead. That spares you the frustration of zipping a 40 MB video and getting a 39 MB file back.
Why use EZCompressor for compressor tasks?
Size limits are everywhere. Job portals, visa applications, university admissions and exam registrations often cap a photo at 20–100 KB and a PDF at a few hundred KB, with no advice on how to get there. An online compressor that accepts the exact number turns a frustrating rejection into a two-minute job, and you keep the best quality the limit allows.
Smaller files also make daily work easier. Lighter images help web pages load faster, a compressed slide deck fits in an email, and a shared drive stops filling up with 30 MB reports. Because your files are never sent to a server, you can compress files online that you would never hand to an unknown server: payslips, medical letters, passport scans and client contracts.
Who uses our compressor tools?
Job applicants
Shrink a CV PDF under a portal's 200 KB cap, or bring a photo and signature down to the sizes recruitment forms list, without losing legibility.
Students
Fit exam registration photos, scanned certificates and coursework PDFs under strict upload limits, straight from a phone, with no app to install.
Office teams
Make bloated Word reports, PowerPoint decks and Excel workbooks small enough to email, while the text, styles and layout stay exactly as they were.
Web developers and bloggers
Cut PNG screenshots and JPEG photos to a fraction of their size before publishing, so pages load faster and hosting storage lasts longer.
Online sellers
Batch-compress product photos to meet marketplace file limits and speed up listing pages, then download the whole set as one ZIP.
Anyone with private paperwork
Compress bank statements, ID scans and medical documents without sending them to anyone, which keeps those sensitive papers off third-party servers entirely.