Toolbasekit
About Format Converter

Convert images between formats in your browser — JPG ↔ PNG ↔ WebP ↔ GIF ↔ BMP ↔ TIFF, with transparency preserved where the target format supports it, with no watermark, no file count limit, and no upload. Drop in one image or a whole folder, pick the target format, and download the converted files in seconds. The whole operation runs locally; nothing is sent to any server.

The reason you convert formats comes down to what the receiving system expects. **Websites** usually want WebP for speed or JPG for universal compatibility. **Design software** varies — Photoshop happily eats PNG, Figma prefers SVG, Canva accepts most things but exports differently. **Government portals** typically demand JPG with explicit size caps (and nothing else — PNG and WebP get rejected). **Print services** want TIFF or high-quality JPG. **Legacy Windows applications** often need BMP. **Email attachments** are safest as JPG or PNG. The conversion itself takes a fraction of a second; the trick is knowing which format to pick for which destination.

Because the conversion runs on your own hardware using the browser's Canvas and image codecs, there are no file size caps imposed by server bandwidth, no queue to wait in, no account to create, and no watermark on the output. Batch processing works — drop a folder, convert everything to a different format in one go, download as a ZIP.

Why this runs on your device

The honest reason to convert images in your browser instead of on a web service is twofold. First is speed: for a batch of 20 photos, uploading and downloading across a server-side converter takes several minutes on a decent connection; the same batch converts locally in under 30 seconds. Second is privacy: image conversion is one of the operations people perform on documents they shouldn't be uploading to a free online service — scanned passports needing to be JPG for a visa portal, academic transcripts needing to be PNG for an application form, invoices needing to be converted for an accounting import. These are documents whose terms of use you don't actually read before clicking "upload now" on a random free converter, and you'd rather they stayed on your laptop. Here the conversion is performed by the browser's native image engine against a file sitting in your tab's memory. There's no server-side converter — our page is static HTML and JavaScript. The browser's network tab will show you zero outbound requests carrying image data when you convert; the only thing the page loads is itself.

How to use Format Converter
  1. Drop one or more images onto the page, or click to pick them. Supported inputs: JPG, PNG, WebP, GIF, BMP, TIFF.
  2. Pick the target output format (JPG, PNG, WebP, GIF, BMP, TIFF). The right choice depends on where the image is headed — web, email, government portal, print, design software.
  3. Optionally adjust quality for lossy output formats (JPG, WebP) using the quality slider.
  4. Download the converted file. For batches, grab each file individually or download everything as a single ZIP. The output is yours — full resolution, no watermark, no account required.
Limitations and trade-offs
  • The browser can't decode every format on the input side — HEIC (iPhone photos) and AVIF are the two big misses, because the browser's built-in decoders don't universally support them. For HEIC specifically, use the dedicated HEIC to JPG or HEIC to PNG tools, which ship a WebAssembly HEIC decoder. For AVIF, convert using a desktop tool first, then upload the intermediate JPG or PNG here if you need a further conversion.
  • GIF-to-static conversion loses animation. If a GIF has multiple frames (animated GIF), the conversion captures only the first frame and discards the rest — because JPG, PNG, WebP, BMP, and TIFF are single-image formats. To convert an animated GIF to a different animation format (WebP animation, MP4), use the Video Converter tool and treat the GIF as a video.
  • Lossy-to-lossy conversion (JPG → WebP, or JPG → JPG at different quality) compounds compression artifacts. Each lossy encode discards a bit of information; converting an already-compressed JPG to WebP, then back to JPG, degrades quality more than you might expect at normal quality settings. For maximum fidelity, convert from the original source (if available) rather than from an already-compressed intermediate.
  • All EXIF metadata — camera data, GPS coordinates, capture date, ICC colour profiles — is stripped as a side effect of re-encoding through the Canvas API. This is usually a privacy win when sharing images, but means metadata-dependent workflows (archival, legal evidence, HDR photography) need a dedicated metadata-preserving converter.
Frequently asked questions