You need to convert a PNG to WebP, a HEIC to JPEG, or a batch of mixed formats to one standard. Image converters are everywhere — but they don't all handle the same formats, and most upload your files first.
What We Compared
- Processing — server upload vs browser-local
- Input formats — JPG, PNG, WebP, AVIF, HEIC, GIF, TIFF, etc.
- Output formats — same list
- Batch support
- Quality control
- Free limits
- Privacy
The Comparison
| Tool | Processing | HEIC support | Batch | Quality control | Free limits | Privacy |
|------|------------|--------------|-------|-----------------|-------------|---------|
| BrowserStay | Browser (local) | Yes | Yes (ZIP) | Yes | None | Never uploaded |
| CloudConvert | Server upload | Yes | Yes | Yes | 10/day free | Uploaded |
| Convertio | Server upload | Yes | Yes | Limited | 10 files/day | Uploaded |
| iLoveIMG | Server upload | Limited | Yes | Limited | Daily limit | Uploaded |
| Zamzar | Server upload | Yes | Yes | No | 2 files/day | Uploaded |
| Squoosh | Browser (local) | No | No | Yes | None | Never uploaded |
| XnConvert | Desktop | Yes | Yes | Yes | Unlimited | Offline |
*Based on publicly available information as of 2026.*
Server-Upload Converters
CloudConvert, Convertio, iLoveIMG, Zamzar support the widest range of formats because server-side processing can use any codec.
Strengths:
- CloudConvert supports 200+ formats
- Convertio handles obscure formats (TIFF, BMP, RAW in some cases)
- No install required
- API access on paid tiers
Weaknesses:
- Files uploaded before conversion
- CloudConvert: 10 free conversions/day
- Convertio: 10 files/day on free tier
- Zamzar: 2 files/day — very restrictive
- Personal photos and client assets sit on third-party servers
Best for: Obscure format conversions, one-off non-sensitive files.
Browser-Based Converters
BrowserStay
Converts between JPG, PNG, WebP, AVIF, and HEIC locally.
Strengths:
- Never uploads files
- Batch convert with ZIP download
- Dedicated SEO pages per conversion pair (HEIC to JPEG, PNG to WebP, etc.)
- Quality slider, free forever
Weaknesses:
- Fewer exotic formats (no TIFF, BMP, RAW)
- Browser memory limits very large batches
Best for: Common web formats, iPhone HEIC photos, batch conversion of personal images.
Squoosh
Google's browser-based compressor/converter.
Strengths:
- Fully local, excellent codec support including AVIF
- Side-by-side quality comparison
Weaknesses:
- One image at a time
- No HEIC input support
- No batch or ZIP
Best for: Single-image format experiments.
Desktop: XnConvert
Free, cross-platform batch converter supporting 500+ formats.
Strengths: Offline, unlimited batch, every format imaginable
Weaknesses: Installation required, utilitarian interface
Best for: Power users who convert frequently and need obscure formats.
Format-Specific Recommendations
| Conversion | Best private option | Best if upload OK |
|------------|--------------------|--------------------|
| HEIC → JPEG | BrowserStay | CloudConvert |
| PNG → WebP | BrowserStay or Squoosh | CloudConvert |
| JPG → AVIF | BrowserStay or Squoosh | CloudConvert |
| TIFF → JPEG | XnConvert (desktop) | CloudConvert |
| RAW → JPEG | Desktop app (Lightroom, etc.) | CloudConvert |
Try It Yourself
Convert images between JPG, PNG, WebP, AVIF, and HEIC with our Image Converter. Batch process, set quality, download as ZIP. Popular: HEIC to JPEG · PNG to WebP · JPEG to AVIF
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