The Image Converter Shakedown

Imagine this: your daughter emails you a photo from her iPhone. Your Windows PC can't open it. You search "convert HEIC to JPG free," click the first result, and drag your photo into the upload box. A progress bar spins. A download button appears. You click it, open the file, and it works. Problem solved.

What you didn't see: your photo — a private image from a family member's phone — just traveled to a server in another country, was decoded, re-encoded, and stored there for an unspecified period of time. The company that owns that server may retain it for "service improvement." You agreed to this in a terms-of-service document you never read. And the entire operation — converting a photo from one format to another — could have run entirely on your own machine, in your browser, in under a second, without sending a single byte to anyone.

The file upload was never necessary. It was a business decision.

Apple created a problem that nobody had to exploit

In September 2017, Apple shipped iOS 11 with a quiet change: iPhones started saving photos in HEIC format by default. HEIC (High Efficiency Image Container) is technically superior to JPEG — it achieves roughly twice the compression at the same visual quality. Apple made the switch because it saves storage space on device.

The problem is compatibility. HEIC is based on the HEIF standard, which requires patent licensing. Windows didn't natively support it until 2018, and even then only through a paid codec extension in the Microsoft Store. Android support arrived gradually, inconsistently. Many photo editing apps, email clients, and web platforms still don't handle HEIC. The result: hundreds of millions of iPhone users produce photos that a substantial fraction of their recipients can't open.

"HEIC to JPG" became one of the most-searched image conversion queries on the internet almost overnight. Anyone who emails iPhone photos to a Windows or Android user eventually hits this wall. Parents emailing photos to grandparents. Realtors sending listing photos to clients. Students submitting assignments. Every one of them lands on a converter site.

What the search results look like

Search "HEIC to JPG" and you'll find pages of results: HEICtoJPG.com, iLoveIMG, Convertio, FreeConvert, Zamzar, CloudConvert, and a rotation of single-purpose sites with names like "heictojpg.io" or "convertHEIC.com." Every one of them asks you to upload your file. Most plaster ads across every available surface. Several hit you with rate limits after one or two conversions. A few redirect you to subscription plans after the first file.

The browser-based alternative — zero upload, instant conversion, completely free — does not appear on the first page. It requires knowing that the technology exists and searching specifically for it. The people who need it most are the ones least likely to know.

What these services actually charge

The converter market has consolidated around a handful of companies running nearly identical playbooks: a free tier with meaningful restrictions, then a subscription to remove them.

CloudConvert

CloudConvert uses a credit-based pricing model. Free users get 25 conversion minutes per day — which sounds generous until you realize that "minutes" refers to server processing time, not wall-clock time, and that the meter is deliberately opaque. Paid plans run $10 to $25 per month, or you can buy one-time credit packages. Every file you convert is uploaded to their infrastructure. Their privacy policy states files are retained for up to 24 hours by default, but paying users can extend storage. CloudConvert is a legitimate business with real infrastructure costs — but those costs exist because they chose a server-side architecture, not because server-side conversion is technically necessary.

Zamzar

Founded in 2006, Zamzar is one of the oldest converter services on the web. Its age shows in the pricing: $18 to $70 per month depending on the plan. Free accounts are limited to 2 simultaneous conversions and a 50MB file size cap. Above that, you subscribe. Zamzar supports an impressive range of formats — over 1,200 — but that breadth doesn't explain why converting a HEIC photo to JPG requires paying $18 a month. The conversion logic is the same regardless of where it runs. Zamzar just built it on a server before browsers were capable of running it locally.

Convertio

Owned by Softo, Convertio limits free users to files under 100MB and caps the number of concurrent conversions. Paid plans run $10 to $26 per month. Convertio is notable for its SEO — it ranks for what feels like every possible format combination search query. The business appears to be primarily an SEO and ad arbitrage play: capture high-intent search traffic, monetize it with ads on the free tier, and convert a fraction of users to subscriptions.

iLoveIMG

Part of the iLovePDF family of tools, iLoveIMG offers free conversion with watermarks and rate limits, then charges $7 per month to remove them. The watermark tactic is particularly aggressive: they return a degraded version of your own file until you pay to get the unmodified result. That's not a feature — it's deliberate damage to your file used as purchase incentive.

FreeConvert

The name "FreeConvert" does a lot of work. The free tier exists, technically, but the experience is built to make you leave it: interstitial ads between steps, file size limits, daily conversion caps, and slow queue times on free accounts. Paid plans run $10 to $25 per month. FreeConvert's ad density on the free tier is among the highest of any converter site — multiple auto-playing video ads compete for attention on a page where the only task is waiting for a file to download.

The single-purpose sites

Below the branded services sits a layer of single-purpose sites: HEICtoJPG.com and its variants, format-specific converters with keyword-optimized domain names. These are almost uniformly ad-infested, often poorly maintained, and exist primarily to capture long-tail search traffic. Many are built on the same underlying converter libraries. The user experience ranges from tolerable to actively hostile: pop-up ads, fake download buttons designed to trick you into clicking an ad instead of your file, and conversion limits that reset after you disable your ad blocker.

Infrastructure, bandwidth, and customer support cost real money. The comparison above understates those costs. But even accounting generously for overhead, the prices these services charge are not justified by server costs. They're justified by the fact that most users don't know another option exists.

The privacy problem nobody talks about

Format conversion is a mechanical operation. It requires no intelligence, no cloud services, no specialized hardware. It's arithmetic: read the source file format, decode it to raw pixel data, encode it in the target format. The math runs the same whether it happens on a server or in your browser.

Yet every major converter site uploads your files to their servers before converting them. This means that every photo you've ever converted using one of these services — every family snapshot, every screenshot of a private conversation, every document you photographed with your phone — traveled to a third-party server before coming back to you. You consented to this, technically, when you clicked "I agree" on a terms-of-service document.

What happens to those files after conversion? The answers vary by service, and they're rarely reassuring. CloudConvert retains files for up to 24 hours. Convertio's policy says files are "automatically deleted" but doesn't specify when. Zamzar's terms note that files may be retained for "operational purposes." Several services include language allowing use of uploaded content for "service improvement" — vague wording that could cover a range of uses.

Think about what people actually convert:

• Medical documents: A scan of a prescription, an insurance card, a doctor's note photographed with an iPhone.
• Personal photos: Family moments, children, private images shared between partners.
• Financial documents: Screenshots of bank statements, receipts, tax documents photographed for records.
• Legal documents: Contracts, ID cards, sensitive correspondence captured as images.

None of these need to leave your device to be converted. Every person who uploaded them to a converter site did so because they didn't know they had another option.

Your browser has been able to do this for years

The browser-based alternative isn't a compromise. It's technically equivalent to server-side conversion and, in many cases, faster — because it eliminates the upload and download round-trip.

The Canvas API

Every modern browser includes a Canvas API that can decode and encode image data. Converting a PNG to JPEG, or a WebP to PNG, is literally three lines of JavaScript: draw the image onto a canvas element, call canvas.toBlob() with the target MIME type, and download the result. No network request. No server. No subscription. This has worked in Chrome, Firefox, and Safari for over a decade.

WebAssembly codecs

For formats that browsers don't natively encode — AVIF, HEIC, and others — WebAssembly brings native-speed codecs directly into the browser. The @jsquash library family, developed by engineers at Google, provides encode and decode support for JPEG, PNG, WebP, AVIF, and JPEG XL — all running in WebAssembly at near-native speed. The heic2any library handles HEIC decoding in the browser using a WebAssembly port of libheif. These libraries are open-source, actively maintained, and used by production applications serving millions of users.

The technical foundation has existed for years. The converter services haven't moved to it because doing so would eliminate their ability to impose rate limits and justify subscriptions. A browser-based converter can't throttle you — there's no server to throttle from.

The rate-limit dark pattern

Free tiers on converter sites typically limit you to 1 to 5 conversions before hitting a paywall. The framing is always "server resources" or "fair use." The reality: a modern server can convert thousands of HEIC files per minute. The compute cost per conversion is functionally zero. The limit exists not because resources are scarce, but because the limit is the product — it's the mechanism that converts free users into paying ones.

A browser-based converter has no such limit because there are no server resources to protect. You can convert a thousand images in a batch. The only limit is your device's processor speed, and modern devices are fast enough that you'll never notice.

Who gets hurt

Image format friction disproportionately affects people with the least technical context to navigate around it. These aren't power users who can script a batch conversion with ImageMagick. They're ordinary people who just want to open a photo.

Grandparents who get HEIC files from their kids and grandkids on iPhones. They know how to open email attachments. They don't know what HEIC is, and when a photo won't open, they don't know why. They end up on a converter site and don't think twice about uploading a family photo to a server they've never heard of.

Small business owners who photograph products with an iPhone and need JPGs for their website or marketplace listings. They convert files a few times a week, which is enough to hit free tier limits. They either pay a subscription or waste time managing upload quotas.

Designers working cross-platform who need to deliver assets in specific formats for clients or developers. WebP from a design tool, AVIF for web optimization, PNG for print — format conversion is a daily task. They often know enough to be frustrated by the tooling but not enough to know that browser-based alternatives exist.

Anyone who emailed a photo and got "can't open this file" back. This is the largest group by far. They're not trying to do anything complicated. They took a photo, sent it to someone, and it didn't work. Every converter site is waiting at the top of the search results.

Why the free alternative stays buried

Browser-based image conversion isn't new. The technology has been viable for years. So why don't people know about it?

Search engine economics. CloudConvert, Zamzar, and Convertio spend significant resources on SEO and search advertising. They have domain authority built over years, thousands of inbound links, and the budget to bid on every relevant keyword. A browser-based alternative without a marketing budget and without SEO investment won't appear on the first page for "HEIC to JPG" — regardless of how much better it is for users.

The "upload" metaphor feels natural. People are accustomed to uploading files for processing — that's how document editors, cloud storage, and email work. The idea that a website could convert a file without receiving it first isn't intuitive if you don't understand how browsers work. Converter sites exploit this mental model by making the upload feel like the only possible mechanism.

Incumbency compounds. The longer these services have existed and dominated search results, the harder it is for alternatives to displace them. Users who don't know to look for something different find the same sites every time.

The free alternative

We built nah's image converter because the upload was never necessary and the subscription was never justified.

It runs entirely in your browser. Your files are never uploaded to any server. Conversion happens on your device using WebAssembly codecs and the browser's native Canvas API — the same technology stack that would be used in any competent browser-based implementation. There is no account, no trial, no rate limit, no subscription, and no catch.

Supported conversions include the formats that cover the vast majority of real use cases: HEIC to JPG, HEIC to PNG, WebP to JPG, WebP to PNG, PNG to JPG, JPG to PNG, SVG to PNG, and AVIF conversions in both directions, along with a full matrix of common format pairs. Batch conversion is supported — drop in a folder of HEIC files, get a ZIP of JPGs. No per-file limits.

Because nothing leaves your device, there's nothing to log, no privacy policy to read, and no question about what happens to your files after conversion. They stay where they started.

The source code is public on GitHub. You can read every line, verify that no network requests are made during conversion, and self-host the tool if you prefer.

How to protect yourself when using any converter

Whether you use our tool or anything else, here's what to know before uploading an image file to a converter service.

1. Never upload sensitive images to a converter site. Medical documents, financial records, legal materials, and private photos have no business leaving your device for a format change. If you need to convert them, use a local app or a browser-based tool that explicitly states no upload occurs.
2. Check whether the converter requires an upload. A legitimate browser-based converter will not show a progress bar that says "uploading." If you see upload progress to a remote server, your file is leaving your device.
3. On iPhone, you can often avoid conversion entirely. In Settings > Camera > Formats, switch from "High Efficiency" to "Most Compatible." Your iPhone will then shoot in JPEG instead of HEIC. You lose some storage efficiency but eliminate the compatibility problem at the source.
4. On Mac, Preview can batch-convert HEIC files natively. Open all files in Preview, select them all, then File > Export Selected Images. No third-party software needed.
5. If a "free" converter asks for a credit card, it's a trial. A genuinely free tool doesn't need your payment information. Any converter that requires signup before downloading your result is likely running a freemium model with upcoming charges.

Image format conversion is a solved problem. The arithmetic is fifty years old. Every modern device has the processing power to run it locally in milliseconds. The server infrastructure, the upload step, the rate limits, and the subscription plans exist not because they're necessary, but because they're profitable — because the people who need this most don't know that the server was never part of the equation.

The pattern is the same across the converter market: find something people need to do occasionally, build a server-side version, capture the search traffic, and monetize the gap between what users know and what's technically possible. It works because technical opacity is a competitive advantage — as long as users don't know their browser can do this, they'll keep uploading.

Your photos don't need to leave your device. They never did.