How to Use Pragmatisoft Photo Share Resizer for Perfect Image Sizes


Key considerations before you start

  • Source image resolution and format: modern phones produce 12–48MP HEIC/HEIF or JPEG files. HEIC often holds more detail at smaller sizes, but compatibility varies.
  • Final use: different platforms and outputs require different balances of resolution, file size, and compression artifacts.
  • Aspect ratio and cropping: preserve important content; avoid blind automatic cropping unless you review results.
  • Batch vs single-image edits: batch processing saves time but check a few samples to confirm quality across images.

  • Output format: JPEG for photos (broad compatibility); PNG for images with text/line art; WebP if you need smaller files and target modern browsers/apps.
  • Quality (JPEG): 85% — good balance of visual quality and file size. Lower to 75–80% when storage or bandwidth is constrained.
  • Resize filter/interpolation: Lanczos — sharp, good for downscaling without heavy artifacts.
  • Color profile: sRGB — safest for web and most devices.
  • Metadata: strip EXIF by default for privacy unless you need camera data; keep orientation tag applied.
  • Progressive JPEG: enable for web delivery so images render progressively in browsers.

Social media (Instagram, Facebook, Twitter/X, TikTok)

  • Target longest edge: 1080–1600 px for Instagram and most mobile-first platforms. Use 1080 px if you prioritize upload speed and file size; 1440–1600 px for slightly sharper display on high-density screens.
  • JPEG quality: 80–85%.
  • Aspect ratio: respect platform limits (Instagram feed 1:1, portrait up to 4:5). If unsure, export at the original aspect ratio and let the platform crop.
  • Metadata: strip EXIF to protect privacy.
  • Sharpening: light unsharp mask (radius ~0.8–1.0 px, amount 20–30%) often helps compensate for downsampling by platforms.

Web galleries and blogs

  • Target longest edge: 1200–1600 px for full-width images; 800–1200 px for content-area images.
  • JPEG quality: 85%; consider WebP at similar visual quality for 30–50% smaller files when supported.
  • Use progressive JPEG or optimized WebP for faster perceived load.
  • Color: sRGB, embed profile.
  • Retain captions and essential metadata separately; strip unnecessary EXIF.

Email and messaging

  • Target longest edge: 900–1200 px to keep attachments reasonable and display well in clients.
  • JPEG quality: 75–80% — small visible trade-off for much smaller files.
  • Consider also creating thumbnails (200–400 px) to embed in the message body and attach full-size as downloadable links.
  • Strip EXIF unless needed.

Archiving and local backups

  • Output format: keep originals (HEIC/TIFF/RAW) whenever possible. If converting, use JPEG quality 95–100% or lossless formats (TIFF/PNG) for master copies.
  • Color profile: keep original wide-gamut profile (Adobe RGB/ProPhoto) if you plan future editing.
  • Include metadata: retain full EXIF, IPTC, and other tags for future reference.
  • Consider lossless compression or cloud storage with versioning.

Printing

  • Output format: TIFF or high-quality JPEG at 100% quality.
  • Resolution: target final print resolution, typically 300 DPI at the desired print dimensions. Example: for an 8×10” print, export at 2400×3000 px.
  • Color profile: use Adobe RGB (1998) or printer/CMYK profile if doing professional printing — consult the print lab.
  • Embed print marks only if requested.

Batch processing tips

  • Test on 5–10 representative images before running large batches.
  • Use consistent naming patterns and output folders to avoid overwriting originals.
  • If using multiple presets, process in separate passes (e.g., thumbnails first, then web-size).
  • Monitor memory/CPU usage on large batches; split into chunks if needed.

Advanced options and why they matter

  • Resize algorithm: Lanczos is recommended for downsizing; Bicubic sharper can also be acceptable. Nearest neighbor is only for pixel-art.
  • Chroma subsampling: for JPEG, 4:2:0 is standard and smaller; 4:4:4 preserves color fidelity but increases size.
  • Progressive vs baseline: progressive helps perceived web loading, baseline is slightly smaller for simple images.
  • Denoise before downsizing: high-ISO images benefit from light denoising; do it conservatively to avoid plastic look.
  • Sharpening after resize: downsampling softens images — apply subtle sharpening tuned to output size.

Example presets (quick copy)

  • Social (fast upload): JPEG, 1080 px longest edge, Quality 80%, sRGB, strip EXIF, Lanczos.
  • Blog (quality): JPEG, 1400 px longest edge, Quality 85%, sRGB, progressive, retain minimal EXIF.
  • Email (small): JPEG, 1000 px longest edge, Quality 75%, sRGB, strip EXIF.
  • Archive (master): Keep original; or TIFF/JPEG 100%, embed profile, retain metadata.
  • Thumbnail: JPEG, 300 px, Quality 70%, sRGB, sharpen +20%.

Troubleshooting common issues

  • Images look soft after resize: apply light unsharp mask after downscaling.
  • File sizes larger than expected: check format (PNG vs JPEG), quality setting, chroma subsampling, and embedded profiles.
  • Colors shift after export: ensure target sRGB and embed profile, or convert from wide-gamut to sRGB.
  • Wrong orientation on upload: ensure rotation is applied, not just orientation tag left in EXIF.

Final notes

  • Start with the general defaults above and adjust for your workflow and platform specifics.
  • Always keep originals for archival use.
  • Test a few representative images before committing to bulk processing.

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