Image Editing
Image Compressor
Reduce JPG, PNG and WebP image file sizes for websites, documents, email attachments and online forms.
Use this tool →Free Online Tools
Image & File Tools
Compress, resize, crop and convert images, calculate image dimensions and resolution, and estimate file sizes with practical browser-based tools from Lamtas.
Useful Image and File Tools for Everyday Work
Image and file preparation is part of many business, academic, creative, technical and personal workflows. Large images may slow down websites, exceed upload limits or take too long to send by email. Incorrect dimensions can also affect printing, social media graphics, presentations and document layouts.
Lamtas provides free tools to help you prepare images, convert common file formats, estimate storage requirements and understand image dimensions. The tools are designed to be simple enough for everyday users while remaining useful for designers, developers, marketers, researchers, students and business professionals.
Image Editing & Conversion
Compress, Resize, Crop & Convert Images
Prepare images for websites, online forms, email attachments, presentations, documents, social media and creative projects.
Image Editing
Image Resizer
Resize images by setting a new width and height while optionally maintaining the original aspect ratio.
Use this tool →Image Editing
Image Cropper
Crop an image by entering the exact X and Y position, width and height of the required area.
Use this tool →Image Conversion
Image Converter
Convert images between PNG, JPG and WebP formats directly in your browser.
Use this tool →Image Conversion
JPG to PNG Converter
Convert JPG images into PNG files for graphics, screenshots, documents and transparent-background workflows.
Use this tool →Image Conversion
PNG to JPG Converter
Convert PNG images to JPG format and adjust the output quality for smaller file sizes.
Use this tool →Image Conversion
WebP Converter
Convert JPG, PNG and other supported images to WebP for modern websites and faster page loading.
Use this tool →Image Conversion
WebP to JPG Converter
Convert WebP images into JPG files for compatibility with documents, applications and image-sharing platforms.
Use this tool →Image Conversion
WebP to PNG Converter
Convert WebP images to PNG format for graphics, editing workflows and applications that require PNG files.
Use this tool →Image Calculators
Calculate Image Size, Ratio, DPI & Resolution
Understand image dimensions before designing, printing, publishing or uploading a file.
Image Size Calculator
Calculate total pixels, megapixels and aspect ratio from an image’s width and height.
Open calculator →Aspect Ratio Calculator
Find the simplified aspect ratio and decimal ratio of an image, screen, video or design.
Open calculator →DPI Calculator
Calculate the physical print dimensions of an image using its pixel dimensions and DPI.
Open calculator →Image Resolution Calculator
Calculate image resolution, total pixels and megapixels from width and height.
Open calculator →File Calculators
Convert and Estimate Digital File Sizes
Convert file-size units and estimate storage requirements for images, audio files and compressed archives.
File Size Converter
Convert digital file sizes between bytes, kilobytes, megabytes, gigabytes and binary units.
Open calculator →File Size Calculator
Estimate uncompressed image sizes and audio file sizes using dimensions, bit depth, bitrate and duration.
Open calculator →ZIP Size Calculator
Estimate compressed ZIP file size and potential storage savings using an expected compression percentage.
Open calculator →Who Can Use These Tools?
Students and Researchers
Prepare images for assignments, research reports, presentations, posters and academic documents.
Businesses and Professionals
Reduce attachment sizes, prepare documents, convert images and meet online submission requirements.
Designers and Creators
Resize, crop and convert images for graphics, portfolios, presentations, social media and digital products.
Website Owners and Marketers
Optimize images for websites, landing pages, campaigns, newsletters and online advertising.
Browser-Based Privacy
Most image editing and conversion functions run directly in your browser using JavaScript and Canvas. This means you can select a file, process it locally and download the result without creating an account or sending the image to a file-processing server.
For sensitive documents or private images, always review the privacy practices of any online service before using it. Keep your original files safely stored before performing conversions or compression.
Frequently Asked Questions
Image & File Tools FAQs
Are these image and file tools free?
Yes. The tools are designed for free use in a modern web browser. No subscription, account or registration is required for the available functions.
Are my images uploaded to a server?
The image editing and conversion tools process files in your browser using client-side JavaScript and Canvas. Your selected files are not intentionally uploaded to Lamtas servers by these tools.
Can I use these tools on a phone?
Yes. Most tools work on modern mobile browsers, tablets, laptops and desktop computers. Larger images may require more device memory and processing time.
Which image formats are supported?
The available tools support common formats such as JPG, JPEG, PNG and WebP. The exact supported input and output formats depend on the individual tool.
Can image compression reduce quality?
Yes. Lossy compression can reduce file size by removing some image information. Use a higher quality setting when visual quality is more important than maximum file-size reduction.
Are the file-size calculations exact?
Some calculators provide mathematical results, while others provide estimates. For example, ZIP compression depends on the actual contents of a file, so the ZIP Size Calculator provides an estimate rather than a guaranteed final size.
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