Images
JPG, PNG & WebP
Exact-size file compression
Make every byte fit. Without the guesswork.
Choose your maximum file size and let Fitabyte do the rest. Fast, private, and beautifully simple.
No signup No watermarks Private processing
Drop your file here
or click to choose from your device
Images · PDFs · Videos · AudioSupported file types
Built for the files you use every day.
Fitabyte automatically detects your file and chooses the right compression method.
Documents
PDF files
Videos
MP4, MOV & WebM
Audio
MP3, WAV & M4A
More ways to make files useful
Meet the Fitabyte toolkit.
Protect, prepare, translate, and open files with the same clean experience.
Protect
Privacy Blur
Hide private details before sharing a screenshot.
Open toolPrepare
MarketReady
Prepare product photos for stores and social media.
Open toolTranslate
Image Translator
Translate the text inside an image and save a new copy.
Open toolOpen
File Opener
Open or convert files your device does not recognize.
Open toolThree simple steps
Choose a file, then check the result.
Choose your file
Drop an image, PDF, video, or audio file into Fitabyte.
Set the limit
Enter the maximum size you need, from kilobytes to gigabytes.
Download
Fitabyte searches compression settings and reports whether the result fits your limit.
Helpful details
Compress a file to the size limit you actually need.
Fitabyte is a free exact-size file compressor for images, PDFs, videos, and audio. Enter a maximum size in KB, MB, or GB and the browser searches for settings that fit below your limit while protecting as much useful quality as possible.
Because processing happens on your device, there is no upload queue and Fitabyte does not store your personal files. Results depend on the original content and browser capabilities, but your source file always remains unchanged.
Common uses
Make files fit forms, messages, and websites.
Application portals
Reduce photos and PDFs below fixed limits such as 100 KB, 500 KB, or 2 MB.
Email and messaging
Shrink attachments for email, WhatsApp, and other services with file-size caps.
Web publishing
Optimize images, audio, and video before uploading to a website or store.
Questions answered
Frequently asked questions
Can Fitabyte compress a file to an exact size?
Fitabyte aims to produce a file at or below your chosen maximum. Some formats and source files have practical minimums, so an extremely low target may require a visible quality reduction.
Will compression reduce quality?
Reducing file size can reduce visual or audio quality. Fitabyte searches for a smaller result and reports its measured size. It can miss a target, and a smaller file can lose useful detail.
Are my files uploaded to Fitabyte?
No. Compression runs inside your browser, and Fitabyte does not store the files you select or the results you create.
Why can a large video take longer?
Video compression is intensive and uses your device processor and memory. Large or long videos may take longer, especially on phones or older computers.
Does PDF compression preserve every feature?
When compression is needed, PDF pages are rendered as images. Selectable text, links, forms and digital signatures are not preserved. Use a different workflow if those features are required.
Compression guides
View all guidesKnow what changes before you compress.
Resolution vs file size vs quality
Separate pixels, bytes, and visual quality so you change the right property.
Read guide →Video bitrate and file size
Estimate the bitrate budget a target leaves for every second of video.
Read guide →Compress scans without blurry text
Protect signatures, stamps, and small print while reducing a scan.
Read guide →100 KB vs 500 KB vs 2 MB
Choose a size budget from the real use case instead of a round number.
Read guide →Measured, not guessed
See how Fitabyte tests its claims.
Reference measurements, tool limitations, and editorial standards are public.
Privacy by design
Your files stay on your device.
Compression, redaction, product-image editing and file opening run locally. Image Translator sends reviewed text through Fitabyte to MyMemory after you choose to translate. Selected image files stay on your device.
Browser-based processing No waiting for uploads No file history
Ready when you are
Compress a file