Zeugly is a free, privacy-first web utility toolkit and developer sandbox. It offers over 95+ browser-based tools to format JSON, decode JWTs, resize images, generate OG preview cards, create secure passwords, convert timestamps, analyze cron expressions, minify SVGs, and inspect QR codes safely. Every action runs 100% client-side in your local browser.

Do I need an account or subscription to use the tools?

No. All tools on Zeugly are 100% free with no sign-ups, no registration, no subscriptions, and no usage limits. You can open any tool, complete your work, and close the tab anytime.

Are tools on Zeugly available offline?

Yes. Once the web application loads in your browser, all processing scripts and tool logics run locally. You can continue using tools like JSON Formatter, Base64 Encoder, Password Generator, and Image Resizer even if your internet connection drops.

How do client-side utility tools keep my data safe?

Unlike traditional online converters that upload your code, confidential files, or text to remote cloud servers, Zeugly uses native browser APIs (such as Web Crypto API, Canvas API, and FileReader). Your inputs are parsed and processed in your local browser memory, ensuring your code, passwords, JWT tokens, and images never leave your machine.

Does Zeugly collect or store any personal data or files?

No. We operate under a strict zero-data collection rule. We have zero backend user databases, zero file storage servers, and zero data tracking scripts. We never ask for or store names, mobile/phone numbers, or physical addresses.

What is Zeugly's cookie policy regarding Google AdSense?

We use third-party advertising partners, including Google AdSense, to serve non-intrusive advertisements. Third-party vendors use cookies to serve ads based on prior web visits. Users can opt out of personalized advertising by visiting Google Ads Settings or www.aboutads.info.

How does client-side JSON formatting and JWT decoding work?

When you paste JSON or JWT strings into our developer tools, JavaScript running inside your web browser parses the payload in memory. Syntax validation, formatting, and JWT claim extractions happen instantaneously without sending any tokens or data payloads across the network.

Are generated passwords and UUIDs cryptographically secure?

Yes. Our password generator and UUID v4 creator use hardware-backed operating system entropy via window.crypto.getRandomValues(). Seeds are generated strictly in your local device CPU.

Can I resize images, create OG cards, or add watermarks without uploading them to a server?

Yes! Our image resizer, watermarking tool, OG image generator, SVG optimizer, vectorizer, and converter tools render images onto HTML5 Canvas elements inside your browser. Calculations and compression are performed locally on your device, and processed files are downloaded directly from your browser memory.

What dimensions are used by the Open Graph (OG) Image Generator?

Our OG Image Generator renders at the standard 1200 x 630 pixels (1.91:1 ratio), optimized for Facebook, Twitter Cards, LinkedIn, Slack, and Discord link previews.

What is QR Code Phishing (Qishing) and how does Zeugly detect it?

Qishing is a social engineering attack where malicious actors replace legitimate QR codes with malicious stickers pointing to spoofed websites. Zeugly allows you to safely scan digital files or live camera streams, evaluating destination URLs for SSL encryption, phishing keywords, known link shorteners, and suspicious query parameters before you visit them.

Why is client-side QR scanning safer than traditional online scanners?

Most web-based QR scanners stream camera feeds or parsed URLs to backend servers, creating logs of scanned locations and links. Zeugly decodes QR codes entirely in your browser using WebAssembly and jsQR/ZXing engines, keeping your camera stream and URLs private.

Image Converter - PNG

Convert to PNG

Convert images to PNG with this free online image converter. PNG is a lossless format that supports full alpha-channel transparency, making it perfect for logos, icons, and graphics that need transparent backgrounds. Processing happens 100% client-side in your browser — your images stay private on your device.

How to Use Report Bug

Target Format

Quality / Compression90%

Color Effect / Filter

Background Fill Color

Fills transparent pixels

Resize Width (px)

Resize Height (px)

Maintain Aspect Ratio

Drag & Drop Image Files Here

Supports PNG, JPG, WebP, GIF, SVG, BMP, TIFF, TGA, WBMP, EPS, HDR, ICO & HEIC files

Step-by-Step Guide

How to Use PNG Image Converter

01Step 1

Select or Drag Image Files

Drag and drop image files (PNG, JPG, WebP, GIF, BMP, TIFF, SVG, etc.) onto the dropzone or click Browse Files.

02Step 2

Configure PNG Settings

Adjust compression quality, color filters, custom width/height dimensions, and background color fill options.

03Step 3

Client-Side Processing

Browser JavaScript converts your image files 100% locally in client memory with zero server uploads.

04Step 4

Download PNG Output

Click Download on individual converted files or export all converted files together as a single ZIP package.

Key Features & Capabilities

Batch conversion to PNG format
Quality & compression slider controls
Dimension resize with aspect ratio lock
Color filter effects (Grayscale, Sepia, Invert, Monochrome)
Transparent pixel background color fill
100% private client-side processing

Privacy & Security Guarantee

100% Client-Side Privacy: All operations occur locally in your web browser memory using JavaScript and WebAssembly. Your files, text payloads, and images are never uploaded to external servers or stored in cloud databases.

Processing Mode: 100% Offline ClientZero Server Telemetry

Frequently Asked Questions

View All Platform FAQs

How does online PNG conversion work without server uploads?

Conversion executes locally using standard HTML5 Canvas and WebAssembly encoders inside your web browser. Your original images never leave your computer.

Can I batch convert multiple files to PNG at once?

Yes. You can upload multiple image files simultaneously, adjust global settings, and download all converted files individually or as a ZIP archive.

Is there any file size or conversion limit?

There are no artificial file size limits or daily conversion caps. Processing speed depends entirely on your local device CPU memory.

Mastering PNG Graphics & Lossless Transparency

What is PNG & How Does It Work?

PNG (Portable Network Graphics) is a raster format created to replace GIF with lossless data compression via the DEFLATE algorithm. PNG retains every pixel with bit-for-bit fidelity, eliminating compression artifacts around sharp text, line art, and interface elements.

Why Convert Images to PNG?

PNG is the gold standard for UI elements, transparent overlays, company logos, and screenshots. It provides full 8-bit alpha channels with 256 levels of opacity per pixel, enabling smooth antialiased edges against any backdrop color.

PNG Conversion FAQs

When should I convert a JPEG photo to PNG?

Convert to PNG when you need to edit an image repeatedly without generational compression loss, or when adding transparent cutouts, watermark overlays, or typography to a photograph.

How does PNG preserve transparent image backgrounds?

PNG files encode an RGBA color model containing an extra Alpha channel value per pixel, allowing complete or partial transparency without matte fringes.

Will converting to PNG increase my file size?

For complex photographs, yes — because PNG is lossless and stores raw detail. For vector logos, line graphics, or screenshots with solid colors, PNG file sizes remain highly efficient.

Experiencing an issue with Convert to PNG?

Notice a bug, calculation error, or unexpected result? Let us know.

Report Bug

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