This page collects every one of our free online image tools in one place: compressors that shrink file sizes without visible quality loss, converters that move photos between JPG, PNG, WebP, AVIF, HEIC and GIF, an AI upscaler that enlarges small pictures cleanly, and Base64 utilities for developers. Every tool runs entirely in your browser — your images are never uploaded to a server, there is no signup, no watermark, and no file limit beyond what your device can handle.
Compress images without losing quality
Oversized images are the number-one reason web pages load slowly and email attachments bounce. The JPEG Compressor, PNG Compressor and WebP Compressor each let you drag a batch of files in, pick a quality level with a live preview, and download the smaller versions in seconds. A typical 4 MB phone photo compresses to 300–600 KB before most people can spot any difference — a 85–90% saving.
Convert between JPG, PNG, WebP and AVIF
Different platforms want different formats, and the converters here cover every direction you are likely to need: JPG to PNG, PNG to JPG, JPG to WebP, PNG to WebP, WebP to JPG and WebP to PNG. The rule of thumb: use JPG for photos you share anywhere, PNG when you need transparency or pixel-perfect graphics, and WebP when you control the website and want the smallest files that still look sharp.
Newer camera formats are covered too. iPhones shoot HEIC by default, which Windows and many websites still refuse to open — HEIC to JPG, HEIC to PNG, HEIC to WebP and HEIC to GIF fix that in one click. For the web’s newest format, AVIF to JPG and AVIF to PNG turn AVIF files back into something every app understands.
Upscale small or blurry photos with AI
The AI Image Upscaler enlarges pictures 2× to 4× using a neural network that runs locally in your browser. It reconstructs edges and textures instead of just stretching pixels, which makes it ideal for rescuing low-resolution logos, old photos, and images saved from social media. Because the model executes on your own device, even private photos stay private.
Base64 tools for developers
When you need an image inside CSS, JSON or an HTML email, Image to Base64 produces a ready-to-paste data URI, and Base64 to Image decodes one back into a downloadable file — handy for debugging API responses that embed images as text.
Worked example: shrinking a photo for a job application
Say a portal demands a photo “under 500 KB, JPG only” and your iPhone gives you a 3.8 MB HEIC. Open HEIC to JPG, drop the file, download the JPG, then feed it to the JPEG Compressor at quality 80. Result: a 420 KB JPG that looks identical on screen — done in under a minute, with the photo never leaving your machine.
Why browser-based image tools are safer and faster
Classic “free” converter sites work by uploading your file to their server, converting it there, and letting you download the result — which means your photos sit in a stranger’s storage, subject to their retention policy, and every megabyte travels twice over your connection. The tools on this page use a different architecture: the conversion code (WebAssembly builds of the same codecs desktop software uses) is downloaded once and runs on your machine. A 40 MB batch of wedding photos converts in seconds because nothing is uploaded at all, and the privacy question simply never arises. It also means the tools keep working on a train with a flaky connection — once the page has loaded, the processing is local.
There is a second, less obvious benefit: no queue and no caps. Server-based converters must ration their bandwidth, so they limit file sizes, daily conversions, or speed unless you pay. Client-side tools have no marginal server cost per file, which is why every tool here is genuinely unlimited and free.
Common image jobs, mapped to the right tool
“The upload form says my image is too big” — run it through the matching compressor (JPEG, PNG or WebP). “Windows can’t open my iPhone photos” — HEIC to JPG. “The logo needs a transparent background format” — JPG to PNG (then edit out the background in your editor of choice). “My website images are slowing the page down” — convert them with JPG to WebP and watch your Core Web Vitals improve. “This old photo is tiny and pixelated” — the AI Image Upscaler at 4×. If you are unsure, start with the format the destination asks for and work backwards; the tool names on this page state their direction explicitly, so the right one is always a scan away.
Looking for something else? Browse the full tools index, turn pages of a document into images with the PDF tools, or design a share image with the Video Thumbnail Generator.