Converting a BMP or TIFF file to JPEG takes under 30 seconds with the right tool. This guide walks you through three methods — the fastest online option, the built-in Windows method using Paint, and the Mac-native method using Preview. You also get ready-to-use quality recipes for common scenarios: Windows screenshots, scanned documents, and print-quality archive files.
The key is matching the conversion method to your file type and intended use. A Windows BMP screenshot needs different handling than a 300 DPI TIFF scan from a medical-grade scanner. Follow the recipe that matches your situation and you will get the right result every time.
Method 1: Online Conversion with ConvertiImage (Fastest)
This method works on any device — Windows, Mac, Chromebook, or mobile. No software installation required.
1 Go to convertiimage.com and upload your files
Open your browser and navigate to ConvertiImage. Drag and drop your BMP or TIFF files directly onto the upload area. Alternatively, click the upload button and browse to select files. You can select multiple files at once — the tool supports batch conversion of up to 50 files per session.
2 Select JPG output format and set your quality
Once your files are uploaded, select JPEG as the output format. Use the quality slider to set your desired compression level. For photographic content being shared online or via email, 85% is the recommended setting — it produces excellent visual quality at dramatically reduced file sizes. For archival copies where you want maximum fidelity, set quality to 92–95%.
3 Convert and download
Click the Convert button. Processing typically takes 5–15 seconds depending on file size and number of files. When complete, download each file individually or click Download All to get a ZIP archive containing all converted JPEGs. Your original files are not modified — the tool creates new JPEG files from your originals.
Method 2: Windows-Native Conversion Using Paint
No internet access? Windows Paint can convert BMP files to JPEG directly. This method also works for basic TIFF conversion on Windows 10 and 11.
1 Open the file in Paint
Right-click the BMP or TIFF file in Windows Explorer. Select "Open with" → "Paint." The image opens in the Paint window. Note: Windows Paint may not open very large TIFF files or multi-page TIFF files — use the online method for these.
2 Go to File → Save As → JPEG picture
Click "File" in the top menu, then hover over "Save As." A submenu appears showing available formats: PNG, JPEG, BMP, GIF, TIFF, and Other formats. Select "JPEG picture." A Save dialog opens where you can choose the filename and save location.
3 Save the file
Choose a filename and click Save. Paint applies a fixed JPEG quality setting — you cannot adjust it in Paint. The resulting JPEG quality is adequate for basic sharing but gives you no control. For precise quality control, use the bmp to jpg converter online instead.
Method 3: Mac-Native Conversion Using Preview
Mac users can convert BMP and TIFF to JPEG using the built-in Preview application — no additional software required.
1 Open the file in Preview
Double-click the BMP or TIFF file — Preview is the default image viewer on macOS and opens automatically. Alternatively, right-click and select "Open With" → "Preview." Preview handles TIFF files excellently, including multi-page TIFFs (shown as multiple pages in the sidebar).
2 Go to File → Export and select JPEG
Click "File" in the menu bar, then select "Export" (not "Save As" — that keeps the original format). In the Export dialog, click the Format dropdown and select "JPEG." A Quality slider appears — adjust it to your preference. Preview's quality slider goes from 0 to 100%; set it to 85 for general use.
3 Save the JPEG file
Choose a save location and filename, then click Save. For multi-page TIFF files, Preview exports only the currently viewed page as JPEG. To export all pages from a multi-page TIFF, use Automator or a third-party tool like XnConvert.
Quality Recipes for Common Scenarios
Recipe 1: Windows Screenshot (BMP → JPG)
Source: BMP from Windows Print Screen / Paint
Content type: Desktop screenshot, UI, mixed text and graphics
Recommended output: PNG (for text-heavy screenshots) or JPEG 80% (for photo-like screenshots)
Method: ConvertiImage online
Expected result: 5.9 MB BMP → ~320 KB JPEG (18× smaller) or ~1.1 MB PNG (5× smaller with zero quality loss)
Note: If the screenshot contains text, UI elements, or icons, PNG preserves sharper edges than JPEG at 80%.
Recipe 2: Scanned Document (TIFF → JPG 90%)
Source: TIFF from document scanner at 200–300 DPI
Content type: Text documents, forms, mixed text/images
Recommended output: JPEG 90% quality
Method: ConvertiImage online
Expected result: 8 MB TIFF → ~600 KB JPEG at 90% quality (13× smaller, text remains legible)
Note: Do not use quality below 88% for documents with text — lower settings create visible artifacts around letter edges.
Recipe 3: Print Archive File (TIFF → JPG 95%)
Source: High-resolution TIFF from professional scanner or camera (300+ DPI)
Content type: Fine art, photography, print production imagery
Recommended output: JPEG 95% quality
Method: ConvertiImage or GIMP for color-profile-aware conversion
Expected result: 50 MB TIFF → ~5–8 MB JPEG at 95% quality (6–10× smaller, visually near-identical)
Important: This creates a web delivery copy only — always convert bmp tiff to jpeg online while keeping the original TIFF as your master.
Troubleshooting Common Conversion Problems
| Problem | Cause | Solution |
|---|---|---|
| File too large to upload | TIFF files can be 50–200 MB, exceeding upload limits | Use a desktop tool (IrfanView, XnConvert, GIMP) for very large files. Alternatively, resize the image first using Mac Preview or Windows Paint before uploading. |
| Colors look different after conversion | TIFF had embedded ICC color profile not applied during conversion | Use GIMP or Photoshop for color-profile-aware conversion. These tools correctly apply the embedded color profile before converting to sRGB JPEG. |
| Transparency in TIFF not handled | TIFF had alpha channel; JPEG does not support transparency | Convert to PNG instead of JPEG to preserve transparency. If JPEG is required, the transparent areas will be filled with white — choose a tool that lets you control the background fill color. |
| Multi-page TIFF only exports one page | Most basic tools only export the first or current page | Use XnConvert or GIMP's Script-Fu batch function to export all pages from a multi-page TIFF as numbered JPEG files. |
| JPEG is larger than expected | Quality set too high, or TIFF had very fine detail | Reduce quality setting by 5–10%. For fine art or highly detailed photography, high-quality JPEG will always be larger than for simple photos. |
Best BMP to JPG Converter: Convert Legacy Windows Images to JPEG Free (2026) — comprehensive tool comparison
What Is a BMP File and Why Is It So Large? — understand why BMP and TIFF files are enormous
