Browser-based tools.
Built for privacy.

In the modern web, almost every online utility requires you to upload your files, images, or documents to a remote cloud server. This model exposes your private details, creates potential security vulnerabilities, and introduces unwanted network lag. Arovat is built on a different philosophy: 100% client-side execution. By leveraging cutting-edge web technologies like WebAssembly (WASM), WebGL, and modern browser APIs, Arovat runs all computations directly inside your device's browser sandbox. Whether you are using our online protractor angle finder, compressing animated GIFs, or redacting sensitive PDF contracts, your files never leave your device. It is fast, secure, and works entirely offline once loaded.

Interactive Digital Angle Finder & Online Protractor

Our flagship digital angle finder tool is a comprehensive utility designed for designers, students, builders, engineers, and DIY enthusiasts. Unlike traditional physical tools or complex CAD software, this interactive protractor angle finder operates instantly on any device with a screen.

• On-Screen Protractor: Adjust two interactive alignment arms on a full 360-degree circular scale. Precision snapping options (from 0.1° up to 90°) ensure you capture precise angles instantly.
• Triangle Angle Finder: Upload any image or schematic to overlay the protractor. This makes it an ideal triangle angle finder for analyzing roof pitches, geometric diagrams, or construction photos.
• Live Camera Angle Finder: On mobile, use your camera stream as a backdrop to measure real-world objects in real time.
• Digital Spirit Level: Tap into your mobile device's accelerometer for an animated, real-time bubble level.

It is the ultimate multi-purpose angle finder tool available online, combining a camera protractor, photo analyzer, and spirit level in a single tab.

Why Choose Client-Side Tools?

Traditional online tools operate by transmitting your private files to remote servers. This introduces several complications: file size limitations due to bandwidth constraints, long upload and download times, and the risk of server breaches. By executing all code locally in your browser using WebAssembly, Arovat guarantees that your processing speed is limited only by your computer’s processor, not your internet speed. Moreover, since your source assets never touch the network, you can enjoy absolute peace of mind knowing your blueprints, financial PDFs, or family animations are completely secure from third-party interception.

High-Performance GIF Compression

If you need to optimize files for web publishing or Discord uploads, our WebAssembly-powered GIF Compressor offers the ultimate solution. Standard online compressors upload your animation to a server, compress it, and make you wait for a download link. Arovat uses a compiled WASM port of gifsicle to compress GIFs locally. Tweak colors, lossiness, frame rates, and dimensions, and see the file size shrink by up to 80% with live quality previews. It is ideal for shrinking animations down to 256KB, 1MB, or 5MB limits without sacrificing animation smoothness. We also support pausing or aborting active optimization queues to give you complete control.

Secure PDF Redaction: Free Text & Image Redactor Tool

When sharing legal contracts, financial spreadsheets, tax documents, or medical records, protecting sensitive personal data is of the utmost importance. Many users make the critical mistake of using a basic PDF reader to draw black boxes over text, or altering font backgrounds in word processors. Unfortunately, these methods only cover the text visually, leaving the underlying vectors, strings, and characters fully intact. Anyone can open such a file, copy the hidden content, and view the sensitive data. To prevent this, you need a true pdf redactor tool that completely destroys the original pixel and text layers. Arovat provides a powerful, professional free pdf redactor that runs natively in your web browser. It ensures that once a region is redacted, its contents are permanently eradicated.

Our online pdf redactor is designed as a secure, fast, and feature-rich utility for personal and professional compliance. It incorporates several advanced capabilities that are typically locked behind expensive subscription paywalls:

• Comprehensive Text Redactor: Select specific rectangular zones to black out or white out characters. This is perfect for censoring Social Security Numbers (SSNs), phone numbers, physical addresses, names, and pricing structures in contracts.
• Robust Image Redactor: Protect faces, brand logos, license plates, and private items. Arovat accepts PDF files as well as popular image extensions like PNG, JPG, and WebP, functioning as a hybrid document and image redactor tool.
• Visual Filters (Blur & Pixelate): If you don't want a stark black block, use our pixelation or Gaussian blur filters to partially obscure details. This is excellent for indicating redacted regions on diagrams or screenshots while rendering the text unreadable.

To redact documents professionally, users often rely on heavy desktop software like adobe pdf redactor tools. However, these programs are expensive, require complex setups, and can be slow to run. Arovat offers a fast, zero-install alternative that works seamlessly as a pdf redactor windows, macOS, Linux, and mobile solution. Since Arovat runs entirely client-side, it is the safest redactor online application. Your files never cross the network. All redactions are drawn locally onto a canvas, and the output is re-rendered into a completely flattened document. This means it acts as a secure local redactor tool where the server has no knowledge of what documents you are editing. Once the page is loaded, you can even unplug your internet connection and redact files completely offline.

In addition to visual redactions, documents often leak metadata in the background. A PDF file can store information about the document's author, the operating system used to create it, location coords, company names, and revision history. Arovat’s text redactor workflow automatically sanitizes the metadata header of your files upon export. By stripping this hidden information, you ensure that no metadata leaks occur. Combined with our Print-Ready monochrome converter, you can sanitize, redact, and optimize documents for physical printing or digital filing within a single, privacy-focused dashboard.

For businesses, law firms, and medical providers, redacting private information is not just about safetym it is a legal requirement. Regulatory bodies enforce strict standards under GDPR, HIPAA, and FERPA to prevent data leaks. Using a secure redactor online tool like Arovat ensures that you remain fully compliant. Because no files are uploaded to our servers, you do not need to sign complex data processing agreements, and your data exposure risk remains absolute zero.

Convert PDF to Monochrome: Online Black and White Converter

Many home offices, schools, and corporate departments rely on monochrome laser printers for everyday document printing. However, when toner cartridges run low or drum kits begin to age, they lose the ability to print fine grayscale gradients. Instead of rendering gray text, shaded table rows, or subtle diagrams clearly, the printer outputs faint, streaky, or completely invisible gray washes. This makes reading important charts, legal footnotes, or contracts highly challenging. The most effective way to solve this issue is to use a dedicated black and white pdf converter that processes your color documents and maps them to pure black and white before sending them to the spooler. By utilizing Arovat's monochrome pdf tool, you can convert all mid-tone colors and grays directly into solid black, forcing your laser printer to apply a dense toner layer that remains highly readable.

Arovat provides a comprehensive suite that allows you to convert to black and white pdf files and images under one unified workspace. The tool accepts both documents and image extensions, serving as an all-in-one black and white converter:

• PDF to Black and White PDF Mode: Converts multi-page documents. It reads each sheet and applies a custom luminance threshold. Any pixel brighter than the threshold becomes pure white, while darker pixels are mapped to pure black. This is excellent for scanning, legal briefs, and text-heavy reports.
• Convert Image to Monochrome: Process drawings, blueprints, maps, or scanned signatures. You can transform any color to black and white image (JPEG, PNG, WebP) within seconds.
• Adjustable Threshold Controls: Drag the slider to adjust the dark-to-light cutoff point. This enables you to salvage extremely faint handwriting on scans, or clear up muddy background shadows on poor photocopies.

If you convert a detailed photo or gradient directly using a hard threshold cutoff, you will end up with high-contrast, binary black-and-white silhouettes that lose all photographic details. To prevent this, Arovat's black and white image converter incorporates several professional dithering algorithms. Floyd-Steinberg Dithering spreads pixel errors across neighboring coordinates to simulate high-fidelity gray shading using patterns of black and white dots. Atkinson Dithering offers a cleaner, higher-contrast dot pattern that works exceptionally well for mixed-media pages containing both text blocks and diagrams. Ordered Dithering uses structured pixel grids to render quick, retro-styled halftones that print reliably on older digital printers. By utilizing dithering, you can convert PDF to monochrome without losing the visual context of your charts, illustrations, and images.

Beyond fixing faded prints, converting documents to monochrome is an excellent strategy for reducing physical printing costs. Laser toner and inkjet cartridges are expensive, and printing unnecessary color gradients or dark background fills drains resources quickly. By running your files through our monochrome pdf converter, you sanitize document layers, strip out redundant color channel data, and flatten background elements. This decreases physical ink consumption, reduces spooling file size over local office networks, and speeds up printing throughput on standard office hardware.

Just like all other Arovat utilities, our monochrome converter runs completely client-side. Typical online converters require uploading your corporate spreadsheets, payroll reports, or private blueprints to their cloud systems, raising security and confidentiality concerns. Arovat processes all pages locally within your browser's isolated sandbox. No files are ever sent over the network, ensuring that your corporate data remains completely secure on your computer. It requires no software licenses, works on all platforms (Windows, macOS, Linux, iOS, Android), and runs fully offline.

Frequently Asked Questions (FAQ)