Can I watermark transparent PNG images without losing transparency?

Yes, select PNG output format and transparent backgrounds will be fully preserved during watermarking.

Can I watermark transparent PNG images without losing transparency?

Yes, select PNG output format and transparent backgrounds will be fully preserved during watermarking.

ResizeInKB

Compress & Resize Images in KB

100% Free & Private Secure

Batch Watermark & Brand Logo

Add text, copyright stamps, or logo watermarks to multiple photos at once

Drop photos here, or browse

Watermark 1 or 20+ photos simultaneously with text or custom logo

✨ Select 1 or Multiple Photos to Watermark

100% Free ToolWatermark & LogoBatch & Privacy

Automatic Batch Watermark & Brand Logo Tool

Apply text watermarks, copyright stamps, or transparent brand logos to multiple photos simultaneously. 100% local browser processing.

Author & Technical ReviewerVerified by Frontend Performance Team

Strict 100% In-Browser Binary Compression

Tested on 50+ official Indian exam engines (SSC, UPSC, IBPS, NTA, Passport Seva). Zero server upload, zero data collection.

100% Free & 100% Private Secure

Protecting your digital assets and brand identity is essential before publishing photos online or sharing proofs with clients. Our Automatic Batch Watermarking & Brand Logo Tool allows you to apply customizable text stamps, copyright notices, or transparent PNG brand logos across single or multiple images simultaneously—100% inside your local browser memory.

How to Automatic Batch Watermark & Brand Logo Tool

1Upload single or multiple images by dragging & dropping or clicking 'Upload'.
2Select Watermark Type: Text, Brand Logo, or Both.
3Customize watermark text, font, color, opacity, or upload your PNG brand logo.
4Choose positioning (Corners, Center, or Full Grid Tile Pattern).
5Click 'Download Watermarked Photo' or 'Download All (.ZIP)' to export your protected images.

Target Specifications

Processing Engine100% Client-Side HTML5 Canvas (0 Bytes Uploaded)

Supported Watermark TypesCustom Text, Copyright Stamps, Transparent PNG Brand Logos, Both

Layout Options5 Corner/Center Positions + Diagonal Full Grid Tile Pattern

Batch ExportIndividual Photo Download or Combined ZIP Archive

Key Advantages:

100% client-side privacy guarantee

Batch watermarking with single-click ZIP download

Full tile grid pattern for full image copyright protection

Official Portal Upload Criteria Comparison

Govt & College Forms

Exam / Portal Name	Photo Limit	Signature Limit	Dimensions	Required Format
SSC (CGL/CHSL/MTS)	20 KB - 50 KB	10 KB - 20 KB	3.5 x 4.5 cm	JPG / JPEG
UPSC Civil Services	20 KB - 300 KB	20 KB - 300 KB	350x350 px min	JPG / JPEG
IBPS Bank Exams	20 KB - 50 KB	10 KB - 20 KB	200x230 px	JPG (Black Ink)
NEET / JEE (NTA)	10 KB - 200 KB	4 KB - 30 KB	4x6 Postcard	JPG / JPEG

How Client-Side Image Binary Compression Works Under the Hood

When you select a target size (e.g., 20KB or 50KB), ResizeInKB executes an in-browser binary search algorithm using the HTML5 HTMLCanvasElement.toBlob() API. It dynamically adjusts JPEG quantization matrices and pixel dimensions directly inside your browser's V8 JavaScript engine memory. Because no HTTP requests send image data across the network, your processing is instant, works offline, and keeps your private photos completely secure.

Frequently Asked Questions

No! All image rendering and logo stamping happens entirely on your device using HTML5 Canvas. Your photos and private brand logos never leave your computer or phone.

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