FreeConvert lives up to its name in the most literal sense — conversions are free, but they're supported by advertising. The trade-off is a cluttered UI, interstitials, and a daily conversion limit that kicks in on the free tier.
ChangeThisFile trades differently: no ads anywhere, no signup, and a hybrid architecture where most image and data conversions run locally in your browser with no upload at all. But its free web tool is capped at one conversion per day — tighter than FreeConvert's free tier, not looser. Beyond that first conversion you buy a $2.99 day pass or a $9.99/month plan. Read the rest of this page as ads-and-privacy versus free volume, because that is the actual trade.
Quick verdict
For the most free conversions in a day: FreeConvert. ChangeThisFile's free web tool stops after one conversion a day; FreeConvert's ad-supported free tier allows more than that.
For a clean, ad-free experience: ChangeThisFile. No ads, no interstitials, no pop-overs.
For privacy: ChangeThisFile. 193 browser-based routes never upload your file to any server.
For API access: ChangeThisFile. Free tier with 25 conversions/month, no daily cap, no card required. FreeConvert offers a developer API on paid plans.
For one heavy session of conversions: ChangeThisFile's $2.99 day pass buys 24 hours of unlimited conversions with no subscription, which is cheaper than a month of either tool's paid plan if you only need one day.
For format breadth: Both tools cover mainstream formats well. FreeConvert has some additional format-specific settings (compression quality, resolution, etc.) on their web UI.
Pricing comparison
| Plan | ChangeThisFile | FreeConvert |
|---|---|---|
| Free browser tool | 1 conversion/day — no ads, no signup | Limited/day, ad-supported — more than 1/day |
| Unlock the browser tool | $2.99 day pass (24h unlimited) or $9.99/mo Pro | Paid plan removes ads and raises the daily limit |
| Free web file size | 25 MB for server-side routes (client-side routes are limited by your own machine) | Higher than 25 MB (check their site for the current cap) |
| Free API | 25/mo, no daily cap, no card | No |
| Entry paid API | $29/mo — 1,500 conversions | Paid plan removes ads, increases limits (check their site for current pricing) |
| Scale API | $499/mo — 40,000 conversions | Higher tiers available |
| API included | Yes, on all tiers including free | Paid plans only |
The free row does not go our way, so read it carefully. One conversion a day is a taste, not a workflow — it exists so you can see whether the output is any good before paying. FreeConvert's free tier gives you more files per day than that, and its free file size cap is well above our 25 MB. What ChangeThisFile asks you to weigh against that is no ads, no account, and the fact that most image and data conversions never leave your browser. If free volume is the deciding factor, the honest answer on this page is FreeConvert.
Feature comparison
| Feature | ChangeThisFile | FreeConvert |
|---|---|---|
| Ads on free tier | None | Yes — significant ad presence |
| Free daily conversion limit (web) | 1/day — client- and server-side routes both count | Yes on free tier, and higher than 1/day |
| Client-side conversions | Yes — 193 routes | No |
| Free API tier | Yes — 25/mo, no daily cap, no card | No |
| No signup for browser tool | Yes | Yes (limited) |
| Conversion settings (quality, resolution) | Basic (target format) | More options on some formats |
| Batch conversion | No | Yes (on some plans) |
That first row used to read "None" on the ChangeThisFile side and it was simply wrong. The free web tool allows one conversion per day, and a browser-side route is not exempt — a client-side conversion past the daily limit still runs, but the finished file is held behind the paywall rather than downloaded. FreeConvert's free tier is metered per day too, and we are not going to pretend ours is the more generous of the two.
Format coverage
FreeConvert covers mainstream image, video, audio, document, and ebook formats. Their UI exposes format-specific settings — image quality sliders, video resolution choices, audio bitrate — which gives more control for one-off conversions where you want to tune output.
ChangeThisFile covers roughly 1,000 specific routes across 82 formats with consistent behavior. Client-side image conversions (JPG, PNG, WebP, HEIC, AVIF, GIF, BMP, ICO, SVG, TIFF) are handled by the browser's Canvas API, which is fast and zero-upload. Server-side routes use FFmpeg, LibreOffice, Calibre, and 7-Zip.
For most everyday conversions, both tools work well. FreeConvert's per-format settings controls are a genuine advantage for users who want manual quality control without code.
Privacy and data handling
FreeConvert processes everything server-side. All files upload to their servers for conversion. They state files are deleted after a period (check their current policy for details).
ChangeThisFile's 193 client-side routes never transmit your data. For image, data, font, and markup conversions — the formats most people are converting day-to-day — your files stay entirely on your machine. No upload, no server, no policy to trust.
For sensitive workflows (employee documents, financial data, private photos), this architectural difference matters more than any policy comparison.
API and developer experience
FreeConvert has a developer API, but it requires a paid subscription. Their API documentation covers format-specific options similar to their web UI.
ChangeThisFile's API is available free (no card) with 25 conversions/month:
curl -X POST https://changethisfile.com/v1/convert \
-H "Authorization: Bearer ctf_sk_your_key" \
-F "file=@image.png" \
-F "source=png" \
-F "target=jpg" \
--output image.jpg
The API is synchronous — no job IDs, no polling. Get a key at changethisfile.com/v1/keys/free and make your first API call in under 2 minutes.
When to choose which
| Use case | Recommended |
|---|---|
| Ad-free experience | ChangeThisFile |
| Privacy-sensitive files | ChangeThisFile (client-side routes) |
| Free API integration | ChangeThisFile |
| The most free conversions in a day | FreeConvert — ChangeThisFile's free web tool stops at 1/day |
| One day of unlimited conversions, no subscription | ChangeThisFile ($2.99 day pass) |
| Per-format quality/resolution controls via UI | FreeConvert |
| Batch conversion (multiple files at once) | FreeConvert (paid plan) |
If you landed on FreeConvert because you want a converter that is actually free and you don't want to pay, be clear about what each side gives you. FreeConvert gives you more free files per day, at the cost of ads and a server upload for every file. ChangeThisFile gives you one free conversion per day with no ads and no account, and keeps most image and data conversions inside your browser — then asks $2.99 for a day pass if you need more today. Neither of those is strictly better; they are different bargains, and only one of them is the cheaper way to convert twenty files this afternoon. FreeConvert's paid plan is also reasonable if you need batch conversion or their format-specific settings controls. Try ChangeThisFile →