Edit, Convert and Compress Files Without Uploading Them

Almost everyone has hit one of these walls. An iPhone photo arrives as a HEIC file that your laptop refuses to open. A PDF is two megabytes over the limit the form will accept. A video is a MOV when the upload box only wants MP4. The usual fix is to search for a free converter, land on a site covered in ads, upload your file, wait in a queue, and download a result with a watermark stamped across it, all while your document sits on a stranger's server for as long as they feel like keeping it.

There is a better way to do this now, and it does not involve uploading anything. We have built a set of file tools that run entirely inside your browser. Your file is read into your browser's memory, processed by code that already downloaded to your device when the page loaded, and handed straight back to you as a download. Nothing is sent to us, because there is no server doing the work. That is not a privacy slogan, it is just how these particular tools are built.

Why a browser can suddenly do this

For years, file conversion meant a server, because browsers could not decode a HEIC image or re-encode a video on their own. That changed. Modern browsers can run near-native code through WebAssembly, read and draw images on a canvas, and manipulate PDFs directly. So the same work a conversion website used to do on its servers can now happen on the device already in your hand. The practical upshot is that results are instant for small files, there are no size tiers or queues, and there is no watermark, because no company is paying for server time and looking to recoup it.

What you can actually do

The tools fall into four groups. None of them ask for an account, and none of them upload your files.

Images: convert, compress, resize, crop

This is the biggest group, because image problems are the most common. You can convert between JPG, PNG, WebP and HEIC, turn stubborn iPhone HEIC photos into JPGs that open anywhere, and change WebP images into JPGs for the apps that still reject WebP. You can compress an image to a target size when something needs to slip under an upload limit, resize to exact pixels for a profile photo or a marketplace listing, crop to a set ratio like square or 16:9, and render an SVG into a crisp PNG at whatever width you need.

PDFs: merge, split, shrink, extract

PDFs are where the free-tool web is at its most predatory, so this group matters. You can merge several PDFs into one, split one into pieces, rotate pages, delete the pages you do not want, and compress a heavy PDF down to a target size so it fits an email or a portal. You can also turn images into a PDF, pull a PDF back out to JPG or PNG images, and extract the plain text from one. For anything that involves a contract, a bank statement, or a medical form, keeping the file on your own machine is the entire point.

Audio and video: convert, trim, compress

These run on a media engine that loads once, the first time you use a media tool, and then stays ready. You can convert audio between MP3, WAV, OGG and FLAC, compress or trim it, and on the video side convert, compress, trim or mute clips. The everyday jobs are covered too: pull the audio out of a video as an MP3, turn a MOV into an MP4, and go both ways between MP4 and GIF.

Text and developer utilities

The last group is a grab bag of small tools that save a trip to a heavier app: a word counter, a case converter, JSON to CSV and back, Base64 and URL encoding, a UUID generator, a cron expression builder, and a set of everyday calculators for percentages, age, unit conversion and time zones. Small things, but they add up when you use them weekly.

Where the limits are, honestly

Running on your own device is a real advantage, but it comes with real edges, and it is worth being upfront about them. Very large files are limited by how much memory your device has, so a two-hour 4K video is a job for a desktop app, not a browser tab. The first time you use an audio or video tool, the engine that powers it downloads once, which takes a moment on a slow connection. And some professional codecs, like H.265 video encoding, are not practical to run in a browser yet, so we stick to formats that are. These are not editors that replace Photoshop or a full video suite, they are fast, single-purpose tools for the conversions and clean-ups that eat your afternoon.

The quiet benefit: nothing leaves your device

A file is often more sensitive than a search query: a resume has your address, a bank statement your balance, a photo the place it was taken. When the work happens on your device, none of that has to be trusted to anyone, and there is nothing to leak in a breach later. The fuller argument, across every AI tool, is in why AI privacy matters.

Browse the full set by category: file converters, PDF tools, and text and developer utilities. All free, no account, nothing uploaded.

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