01
Convert the target to bytes
The KB value is converted to bytes (KB × 1,024), and every candidate result is compared with that limit.
Exact File Compression
Reduce File Size to the Exact KB or MB You Need
Reduce JPG, HEIC, PNG, WebP, GIF, and PDF file size online. Choose a target in KB or MB, compress privately in your browser, and download without signing up.
To reduce a file's size, choose the required KB or MB limit, select your image or PDF, and start compression. ExactSizer adjusts quality and dimensions in your browser to get as close as practical to the requested size.
ExactSizer is a private file compression toolkit for images, PDFs, forms, portals, and strict upload-size limits.
Free
No signup
Private
Exact Targets
Start compressing
Choose a target, upload your file, and download the result.
Verifiable method
How ExactSizer targets a file-size limit
The target is treated as a maximum limit, not a promise that every source file can finish at exactly the same byte count.
02
Search for the highest usable image quality
For JPG, PNG, and WebP, the engine tests quality between 0.1 and 1.0 using 12 binary-search steps. If that is not enough, dimensions decrease in 5% increments down to a minimum of 10% of the starting dimensions. To bridge encoder size plateaus, it also tests higher-quality candidates and refines dimensions in 6 passes, always retaining the closest result under the limit.
03
Compress animated GIFs deliberately
For animated GIFs, the engine tests multiple dimensions, palette sizes, and frame intervals. A strict target may therefore reduce colors or retain fewer frames, and the result reports those changes.
04
Rebuild PDFs page by page
Each page is rendered in the browser, converted to a JPEG image, and embedded in a new PDF. The engine tests quality and can reduce render scale in 5% increments. This may remove selectable text and soften fine detail.
05
Process locally and report the result honestly
The file is processed in browser memory. The result reports whether the target was met and shows a warning if minimum settings are reached before the requested size.
PDF upload limits
Popular PDF size targets
Start with the exact PDF limit your upload form gives you, then adjust the PDF profile only if the file still needs to be smaller.
Compress PDF to 50KBFor very strict portals and small document uploads.Compress PDF to 200KBA common target for visa, government, and university forms.Compress PDF to 500KBUseful when 200KB is too small but the portal is still strict.Compress PDF to 1MBA practical limit for resumes, applications, and email.Compress PDF to 2MBAlso useful for searches like 2048KB PDF and 2MB upload limit.
Image upload limits
Popular image size targets
Target the exact limit for your profile photo, passport, or signature. Works for JPG, HEIC, PNG, WebP, and GIF.
Optimized for Specific Needs
Whether it's a passport photo, a digital signature, or a multi-page transcript, we target the exact limit you're facing.
Passport & Visa
Shrink photos to 50KB or 100KB with correct dimensions for official forms.
Digital Signatures
Keep signatures sharp while hitting strict 20KB or 50KB upload limits.
CV & Resumes
Compress PDF resumes to 1MB or 2MB to ensure they pass through HR portals.
Why ExactSizer?
Most compressors only make files smaller. ExactSizer is built for the moments when a form, portal, or website asks for a specific limit and you need to get there quickly.
Security by Design
Your files stay on your device while you compress them, which is especially helpful for personal documents, IDs, and application files.
Made for Real Upload Limits
Use it for passport photos, visa forms, resumes, email attachments, school portals, and other uploads that reject files for being too large.
Supported Formats
From website images to email attachments, we've got you covered.
JPG / JPEG
Great for photos, portraits, and everyday web images.
PNG
Useful for screenshots, interface assets, and graphics.
WebP
A smart choice for lightweight image delivery on modern sites.
GIF
Useful for classic web GIFs when the main goal is a lighter file.
Ideal for forms, attachments, and document upload limits.
Solutions for common upload tasks
Go directly to the converter or guide that matches your form, application, or upload portal.
Open the converter
Convert HEIC to JPG
Turn an iPhone HEIC photo into JPG, then reduce it to the required file size.
Read the guideHow to Compress a Resume PDF to 1MB for Job Applications
A focused guide for applicants who need a clean, readable resume PDF under a common ATS or career portal limit.
Read the guidePassport Photo Upload Failed: How to Fix Size, Dimension, and Format Errors
A practical troubleshooting guide for photo uploads rejected by passport, visa, exam, and administration portals.
Read the guideHow to Compress Images for Government Portals, Scholarships, and Administration Sites
Use this guide when an official website asks for a strict photo size and gives almost no useful upload feedback.
Read the guideHow to Compress a PDF to 1MB or 2MB Without Losing Too Much Readability
A practical guide for balancing file size and readability when you need a PDF under 1MB or 2MB for uploads or email.
Read the guideHow to Compress Documents for University Applications and Portals
A complete guide for students who need to upload transcripts, certificates, and ID documents under strict university portal limits.
Frequently Asked Questions
Quick answers about file limits, supported formats, and common upload situations.
Can I compress an image to exactly 100KB or 200KB?
Yes. You can set targets like 100KB and 200KB directly. The final result depends on the original file, but the tool is built for this kind of request.
Can I compress PDF files to a specific KB size?
Yes. PDF compression can be aimed at a specific size for upload limits, email attachments, and portal requirements.
Which file types does ExactSizer support?
ExactSizer supports JPG, HEIC, PNG, WebP, GIF, and PDF files.
Will my files stay private?
Yes. Files stay on your device during compression, which makes ExactSizer a good fit for sensitive documents and images.
What if my file cannot hit the exact target?
Some files have less room to shrink than others. In those cases, ExactSizer aims for the closest practical result while keeping the file usable.
Can I use ExactSizer for form, visa, or job application uploads?
Yes. ExactSizer is especially useful when a portal asks for a strict file-size limit such as 100KB, 200KB, or 500KB.
Do I need to install anything to use ExactSizer?
No. You can open the page, choose your file, set your target size, and download the compressed result in the same session.
What does 'file size greater than 100KB' mean?
It means the file is currently too small and must be larger than 100KB. However, most users see the opposite error: 'file exceeds maximum size.' ExactSizer helps you shrink files to fit those maximum limits.