Image to Text (OCR)
Extract text from images, scans, and screenshots using browser-based OCR technology.
●Image Tools
🔒 Local⚡ Free
Free image compressor online — reduce JPG, PNG, and WebP file size without losing quality. No uploads, no watermarks, instant results.
Compress photos and screenshots directly in your browser with adjustable quality controls. Reduce image file sizes by up to 90% for web, email, and app uploads — no server upload required. Supports JPG, PNG, WebP, and batch processing.
Designed for direct use without extra steps or inflated trust claims.
Drop images to compress
JPG · PNG · WebP · Batch supported · 100% private, runs in your browser
Maximum file size: 25 MB
Click to browse or drag and drop
A 300KB image file size is often required for email attachments, web page optimisation, social media uploads, and enterprise document management systems. Keeping images under 300KB ensures fast page loads, lower bandwidth usage, and broad compatibility with upload portals that enforce file size restrictions. ToolVines Image Compressor reduces your image to under 300KB directly inside your web browser. There are no files sent to any server — everything happens locally, which means your passport photo, signature, or personal documents remain completely private. The compressor uses industry-standard browser APIs to intelligently lower JPEG quality, optimise PNG palettes, and strip unnecessary metadata, achieving smaller file sizes while preserving the maximum possible visual clarity. Unlike downloadable software that requires installation and technical knowledge, ToolVines works on any device with a browser — including Android phones, iPhones, Windows PCs, and Macs. There is no account to create, no subscription to pay for, and no watermark added to your output. Simply upload your image, set 300KB as your target (or use the prefilled setting on this page), and download the result instantly.
Step 1: Upload Your Image
Click the upload box or drag and drop your image (JPG, PNG, or WebP). Your image is processed locally and never leaves your device.
Step 2: Confirm 300KB Target
The target file size is already set to 300KB. You can fine-tune the target KB value using the slider if needed.
Step 3: Compare Quality
Review the side-by-side preview showing your original image and the compressed version, along with the exact resulting file size.
Step 4: Download the Result
Click "Download" to save your compressed image. It is guaranteed to be under 300KB and ready for upload.
A 300KB image loads significantly faster on web pages, uses less bandwidth, and easily passes email attachment limits and portal upload restrictions.
It iteratively optimizes JPEG quality and dimension scaling using native browser APIs until the resulting file is at or just below your 300KB target.
In most cases, visual clarity is maintained without noticeable degradation. If necessary to meet the 300KB target, dimensions may be slightly scaled while keeping the aspect ratio intact.
No. All compression happens locally in your browser. Your images never leave your device, ensuring complete privacy.
Yes. PNG images can be converted and compressed to JPEG or WebP to achieve the 300KB target with high visual fidelity.
You can adjust the target KB slider to any size you need, or use our other size-targeted pages linked below.
Yes. ToolVines works in Chrome, Safari, and all modern mobile browsers on both Android and iOS devices.
No. You can compress as many images as you need with no daily caps or cooldown periods.
No. All compressed images are completely free of watermarks or branding.
Yes, completely free with no account creation or subscription required.
Compare browser-based image resizing and compression features.
| Tool | Ideal Use Case | Output Format | Action |
|---|---|---|---|
| Image Compressor | Reduce file size of JPG, PNG, or WEBP images with custom quality controls. | Compressed Image | Use Compressor → |
| Image Resizer | Change width and height dimensions of images using pixels or percentages. | Resized Image | Use Resizer → |
| Image Cropper | Trim margins or select a precise aspect ratio window (e.g. 1:1, 16:9). | Cropped Image | Use Cropper → |
Engineered for high-security, client-side browser execution with zero network transmission.
Client V8 & WASM
Computed in local browser memory with zero upload lag.
0 Bytes Transmitted
No payload uploads, database logs, or external API relays.
Volatile RAM Only
Inputs automatically purged when the page or tab is closed.
Clean & Unwatermarked
Native format downloads and clipboard synchronization.
Need alternatives or related utilities? Explore more in Image Tools or view the complete tools directory.
This tool processes all inputs locally in your browser. Your files and data are never uploaded to our servers, keeping them 100% private.
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