Compress Image Online (Free, Private, Target KB & Batch)
Compress JPG, PNG and WebP images right in your browser. Use the quality slider or set an exact target file size (50 KB, 100 KB, 200 KB) with zero uploads.
Private tools for files that shouldn't leave your computer.
Fifteen free utilities across 4 categories—Image Tools Suite, Labels & Print, AI & Documents, and Data & Developer. They run in your browser, so your files are never uploaded.
Verifiable Local Privacy & Binary Precision
Most online converters upload your confidential shipping labels, family photos, and CSV databases to remote server queues. Vexolora processes your files directly inside your browser's volatile memory (RAM) using standard Web APIs (ArrayBuffer, DataView, DOMParser, and HTML5 Canvas).
- ✓ Zero Server File Storage: Core tools never upload your files—verify it yourself in your browser's Network tab.
- ✓ True Binary Header Editing: Our 300 DPI Scrubber writes 9-byte PNG
pHYschunks and JPEGJFIFheaders without re-encoding pixels. - ✓ Batch & ZIP Ready: Process up to 100 images at once and download a single standards-compliant ZIP archive.
Connected Utilities for Real Tasks
Preview Zebra ^XA…^XZ labels at 203/300 DPI and export exact 4×6 inch thermal PDFs.
Set lossless 300/600 DPI headers on transparent PNGs and scrub hidden GPS EXIF coordinates.
Batch convert HEIC and WebP/AVIF to JPG/PNG, compress under 100 KB, or remove white backgrounds.
Convert documents to Markdown, strip U+200B Unicode bytes, and query CSV/Parquet with PII masking.
Latest Articles & Tutorials
Three steps. No upload.
Pick a tool
Choose from nine tools, or search for the job you need done.
Drop in your file
Your file opens right in your browser. It never leaves your device.
Download the result
Save your finished file, or send it straight to another Vexolora tool.
How to Use the Image Compressor
1. Step 1: Drop Your JPG, PNG, or WebP Images
Drag and drop one or up to 100 images into the compressor, click Choose files, or paste from your clipboard.
2. Step 2: Select Target KB Mode (50KB / 100KB / 200KB) or Manual Quality
Pick "Target ≤ 100 KB" (or ≤ 50 KB / ≤ 200 KB) for strict portal limits, or choose "Manual Quality Slider" for custom compression.
3. Step 3: Choose Output Format (JPG or WebP)
Select JPG for universal form uploads (passports, visas, job portals) or WebP for maximum website speed.
4. Step 4: Click Compress Image(s)
Trigger the 3.5-second binary-search quantization engine to find the highest visual quality under your byte ceiling.
5. Step 5: Verify Byte Savings Percentage & Visual Sharpness
Check the green percentage saved badge (e.g., -74%) and inspect the live preview.
6. Step 6: Download Compressed Image(s) or Batch ZIP
Save your sub-100KB file, download all files as a ZIP archive, or send to the 300 DPI Scrubber.
Frequently Asked Questions
1. How do I compress an image to under 100 KB (or 50 KB) without making it blurry?
Select "Target ≤ 100 KB" (or "Target ≤ 50 KB") in the Compression Mode dropdown. Our engine runs a multi-step binary search over encoder quality so your file lands just under the limit while keeping maximum detail.
2. Is it safe to compress passport scans, ID cards, or signatures here?
Yes. All compression runs 100% locally in your browser RAM. Your sensitive identity documents are never uploaded to a server.
3. What happens if a huge 20 MP photo cannot fit under 50 KB by quality alone?
If minimum quality still exceeds 50 KB due to massive pixel dimensions, the engine automatically steps down pixel dimensions proportionally until the strict byte target is met.
4. Why does converting a PNG to JPG or WebP shrink the file size by 75% to 85%?
PNG uses lossless compression, which creates large files for photographs. Encoding photographic content as high-quality JPG or WebP removes imperceptible chroma noise and strips metadata bloat.
5. Does compressing an image remove hidden EXIF and GPS metadata?
Yes. Re-encoding through the compression pipeline strips bulky EXIF camera tags, GPS coordinates, and embedded thumbnails—which alone saves 30 KB to 65 KB.
6. Can I batch compress an entire folder of website or product images?
Yes! Drop up to 100 images at once and click "Download ZIP" to save the entire compressed batch.
7. What quality setting is best for general website SEO and Core Web Vitals?
A manual quality of 75% to 82% (or Target ≤ 200 KB in WebP/JPG format) typically cuts image weight by 65%+ with zero visible degradation.
8. How do I restore a 300 DPI header if a print portal also requires a small file size?
Compress your image first, then click the "300 DPI ➔" button to inject a lossless 300 DPI JFIF/pHYs header without adding more than 20 bytes.
9. Are there any daily file limits or watermarks?
Never. You can compress unlimited images for free with zero watermarks.
Related Tools
Features & Capabilities
Exact Target-KB Binary Search
Automatically finds the highest quality level that fits under 50 KB, 100 KB, or 200 KB.
Up to 80% File Size Reduction
Shrinks heavy smartphone photos and PNGs into fast-loading JPG or WebP files.
Before & After Byte Savings Audit
Displays original size, compressed size, and exact percentage saved for every file.
Private In-Browser Compression
Safe for compressing passport scans, ID cards, and financial documents locally.
Batch Queue & ZIP Download
Compress up to 100 product or blog images at once and download a single ZIP.
One-Click 300 DPI Header Handoff
Need 300 DPI after compression? Pipe your image straight to our 300 DPI Scrubber.
Core Benefits
✓ Pass Strict 50KB & 100KB Portal Limits
Never get rejected by visa, exam, or job application upload forms again.
✓ Accelerate Core Web Vitals (LCP)
Smaller hero and product images dramatically improve page load speed and SEO.
✓ 100% Local Document Confidentiality
Sensitive personal documents are compressed in browser RAM and never uploaded.
✓ Unlimited Free Batch Compression
No 20-file paywalls or daily limits.
Compress Image Online (Free, Private, Target KB & Batch) — Complete Guide & Technical Documentation
Need to compress an image for a website, job portal, visa application, or email attachment without uploading private documents to a server? Our client-side Image Compressor lets you dial in visual quality or binary-search an exact KB target (50 KB, 100 KB, or 200 KB) directly on your device.
Many government portals, university admissions forms, and KYC systems enforce strict upload limits such as 100 KB or 50 KB. Instead of guessing quality percentages by trial and error, select our Target KB Mode (50 KB / 100 KB / 200 KB). The engine runs a multi-step binary search in browser memory to find the highest possible visual quality that fits strictly beneath your byte ceiling.