We tested and ranked the best image converters of 2026 by privacy, daily limits, format support, and conversion speed. No sponsored placements — just an honest comparison of the tools that actually hold up.
Converts images, audio, video, and documents entirely in your browser. No account, no upload, no daily limit. Works offline after first load.
Google Chrome Labs tool. Browser-based image compression and format conversion. Excellent quality controls. Images only, limited formats (JPEG, PNG, WebP, AVIF, JXL).
Cloud-based with 300+ formats including obscure ones. Files are uploaded and processed on their servers. Free tier is 10 conversions per day, 100 MB per file.
Cloud converter with advanced output options per format. 25 free conversions per day (no account), 200+ formats, good for professional output settings.
Highest free file size limit (1 GB per file). Supports 25 conversions per hour. Cloud-based. Good for large files that would exceed device RAM limits.
| Feature | Convertlo | Squoosh | Convertio | CloudConvert | FreeConvert |
|---|---|---|---|---|---|
| Files uploaded | Never | Never | Yes | Yes | Yes |
| Daily free limit | Unlimited | Unlimited | 10/day | 25/day | 25/hour |
| Account required | Never | Never | No | No | No |
| Free file size | 50 MB | Unlimited* | 100 MB | 1 GB | 1 GB |
| Image formats | JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF, SVG | JPEG, PNG, WebP, AVIF, JXL, BMP | 300+ total | 200+ total | 200+ total |
| Audio / video | Yes | No | Yes | Yes | Yes |
| Works offline | Yes | Yes | No | No | No |
| Batch conversion | Yes | No | Yes | Yes | Yes |
| Cost for unlimited | Always free | Always free | From $9.99/mo | From $9.00/mo | From $9.99/mo |
*Squoosh file size limited by available browser memory. Large files may crash on low-RAM devices.
Choose Convertlo if you convert files regularly and privacy matters — your files never leave your device. Also the right pick if you need a single tool for images, audio, video, and documents without hitting daily caps or signing up.
Choose Squoosh if you're specifically compressing images and want precise control over quality settings. It's built by Google Chrome Labs and focuses exclusively on image compression quality tuning.
Choose Convertio or CloudConvert if you need a format that Convertlo doesn't cover — niche codecs, legacy formats, or highly specific output options. Budget for the paid tier if you'll exceed 10–25 conversions per day.
Choose FreeConvert if you have a file over 50 MB that won't fit in your device's RAM for browser-based conversion. Its 1 GB free limit is the most generous among cloud converters.
macOS comes with Preview, which converts between JPG, PNG, TIFF, BMP, and PDF — but it can't handle WebP, AVIF, or batch HEIC-to-JPG conversion from iPhone photos. For anything beyond those basics, you need a dedicated image converter.
Convertlo is the best image converter for Mac — it runs in Safari, Chrome, and Firefox with no installation. HEIC photos from iPhone convert to JPG or WebP in seconds. Drop an entire folder of images and download a ZIP with one click. Since all processing runs locally, there's no upload delay even on slow connections — and no watermarks on any output.
Squoosh (by Google Chrome Labs) is the best Mac option for compression-heavy work — it shows a live before/after quality slider and runs entirely in Safari with no install required.
For niche formats that macOS Preview doesn't support — TIFF variants, RAW camera formats, legacy codecs — Convertio and CloudConvert both work in any Mac browser without installing anything.
Use Preview: JPG → PNG, PNG → TIFF, single file, no quality control needed, file already on Mac.
Use Convertlo: HEIC from iPhone → JPG/WebP, batch conversion, WebP/AVIF output, file size control, works offline.
Two of the five best image converters on this list never send your files to a server: Convertlo and Squoosh. Both use WebAssembly — the conversion engine runs directly in your browser, and your images stay on your device throughout the process.
That means: no upload wait time, no server queue, no third-party storing your files between sessions. Both tools also work offline after the first page load. For sensitive files — personal photos, financial documents, medical scans — a browser-based image converter is the safest choice.
Convertio, CloudConvert, and FreeConvert all send files to their servers for processing. They publish deletion policies (typically 24–48 hours after conversion), but the files do leave your device and travel over the internet during upload and download.
All five image converters on this list output clean images with no watermarks on the free tier: Convertlo, Squoosh, Convertio, CloudConvert, and FreeConvert. The key difference is that Convertlo and Squoosh are also unlimited — the others cap free conversions at 10–25 per day.
The 5 best free image converters online in 2026 are: (1) Convertlo — browser-based, no upload, unlimited, no account; (2) Squoosh — best compression quality, also browser-based; (3) Convertio — best format coverage with 300+ formats; (4) CloudConvert — best advanced output settings; (5) FreeConvert — best free file size limit at 1 GB. Convertlo and Squoosh are the only two that never upload your files to a server.
Convertlo and Squoosh are both excellent on Mac — they run in Safari, Chrome, or Firefox with no download or installation required. Convertlo supports more formats (including HEIC from iPhone photos) and works offline after first load. For niche formats beyond JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, and SVG, Convertio and CloudConvert work in any browser on Mac without installing software.
Convertlo and Squoosh never add watermarks — both are fully free with clean output on every converted image. Convertio, CloudConvert, and FreeConvert also produce no watermarks on their free tiers, though they have daily conversion limits (10–25/day). Convertlo is the best no-watermark option since it's also unlimited and never uploads your files to a server.
For most users, Convertlo is the best choice — it's unlimited, requires no account, and never uploads your files. Everything converts in your browser. If you need formats beyond JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, and SVG, Convertio or CloudConvert cover 200–300+ formats.
Convertlo and Squoosh both convert images entirely in the browser — nothing leaves your device. Convertio, CloudConvert, and FreeConvert all send files to their servers for processing, which means your files travel over the internet.
Yes — Convertlo has no daily conversion limit. Squoosh is also unlimited. Convertio caps free users at 10 conversions per day, CloudConvert at 25 per day, and FreeConvert at 25 per hour.
Yes. Convertlo, Squoosh, Convertio, CloudConvert, and FreeConvert all work without an account for basic use. Canva (which has a built-in image converter) requires you to create an account even for simple conversions.
Convertlo converts JPG, PNG, WebP, AVIF, HEIC, GIF, BMP, TIFF, SVG, and PDF images. It also supports audio (MP3, WAV, FLAC, AAC, OGG, M4A), video (MP4, WebM, AVI, MKV, MOV), and documents (DOCX, XLSX, CSV, TXT, HTML).
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100% browser-based. JPG, PNG, WebP, AVIF, HEIC, GIF, SVG and more. No account required.
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