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Free Online Image Tools

Compress, resize, convert, edit, inspect and prepare images directly in your browser. Start from the task you actually need instead of guessing a format path.

Compress Image

Reduce JPG, PNG and WebP file size.

Resize Image

Set pixels, scale and output format.

Photo Size & DPI

Convert physical dimensions to pixels.

Image Converter

Convert common formats locally.

Start with the real destination

These workflows combine the checks users usually discover only after an upload fails.

Signature for a form
Exact pixels, KB target, trim, PNG/JPG.
Photo requirement check
Check dimensions, format and file size before submission.
Image too large to upload
Enter the receiving service’s KB or MB ceiling.
Check all upload rules
Validate size, format, pixels and aspect ratio together.

Browse by task

Compression
Compress images to practical file-size targets.
Resize
Resize by pixels or target dimensions.
Conversion
Convert between common image formats.
Optimization
Combine size, format and technical checks.
Editing
Crop, rotate, flip, blur and watermark images.
Privacy
Inspect and clean metadata before sharing.
Social Media
Prepare images for common publishing platforms.

High-value image utilities

Each task links directly to its canonical implementation—no duplicate edit URLs.

Crop Image
Open tool
Rotate Image
Open tool
Flip Image
Open tool
Watermark Image
Open tool
Blur Image
Open tool
Social Media Image Resizer
Open tool
Image Upscaler
Open tool
Image Quality Checker
Open tool
Image to Data URI
Open tool
Image Color Picker
Open tool
Duplicate Image Finder
Open tool
Signature Resizer
Open tool
Photo Collage Maker
Open tool
Straighten Image
Open tool
Image Border Maker
Open tool
Grayscale Image
Open tool
Image Sharpen
Open tool
Brightness & Contrast
Open tool
Image to QR
Open tool

Smart photo tools

AI Background Remover
Remove a person background and export transparent PNG.
Passport Photo Maker
Prepare exact-size passport-style photos.
Visa Photo Maker
Create a visa-photo starting point.
ID Photo Maker
Create custom ID-photo dimensions.
Passport Photo Checker
Inspect size, resolution, format and file size.

Format conversion

JPEG → JPGHEIC → JPGHEIC → PNGHEIC → WebPTIFF → JPGSVG → PNGSVG → JPGBMP → JPGJPG → PNGPNG → JPGJPG → WEBPPNG → WEBPWEBP → JPGWEBP → PNGJPG → AVIFPNG → AVIFWEBP → AVIFAVIF → JPGAVIF → PNGAVIF → WEBPSVG → PNGSVG → JPGSVG → WEBPBMP → JPGBMP → PNGBMP → WEBPGIF → JPGGIF → PNGGIF → WEBPGIF → AVIFICO → PNGICO → JPGICO → WEBPHEIC → JPGHEIC → PNGHEIC → WEBPTIFF → JPGImage → AVIFAVIF Compressor

Image checkers & calculators

Upload Requirement CheckerPixel CalculatorImage Size CalculatorDPI Calculator & ChangerResolution Calculator
Print Size Calculator
Read image dimensions, calculate print pixels with paper presets and bleed, then prepare a fitted or cropped copy in the resizer.
JPG Quality Calculator
Choose a practical JPEG quality level based on the balance between image quality and file size.
Compression Percentage Calculator
Compare file sizes in KB, MB, KiB or MiB. Calculate percentage saved, compression ratio and bytes saved, or see when the output grew.
Image File Size Calculator
Plan scan storage from paper size and DPI, estimate raw image bytes, and compare actual encoded file size without uploading.

GSC-proven exact targets

A small curated set gets hub prominence; non-indexable variants are deliberately excluded from this link graph.

50KB100KB200KB500KB300 × 100px600 × 400px

Compress Image to Exact Size

Only indexable target-size compression pages are linked here.

20KB50KB80KB100KB150KB200KB500KB800KB1MB2MB3MB5MB10MB

Reduce Image to Exact File Size

Only evidence-backed/indexable target pages receive hub links.

Resize Image to Exact Pixels

Create common image dimensions with the curated indexable set.

100 × 100px200 × 200px300 × 300px300 × 100px400 × 300px400 × 400px600 × 400px600 × 800px640 × 480px720 × 1280px800 × 800px1080 × 1080px1080 × 1920px1200 × 630px1280 × 720px1280 × 1280px1920 × 1080px2048 × 2048px

Technical image utilities

Image to ICO Converter
Convert PNG, JPG or WebP images into a real multi-size ICO file for favicons, Windows shortcuts and app icons.
Favicon Generator
Turn one image into a practical favicon set with browser, Apple touch and PWA sizes plus ready-to-copy HTML.
Image to Base64 Converter
Convert an image into a Base64 string or data URI for HTML, CSS, JSON and API testing without uploading the file.
Base64 to Image Converter
Decode a Base64 string or data URI, preview the image and download it as a real file in your browser.
Image Inspector & Dimensions Viewer
Inspect format, file size, pixel dimensions, aspect ratio and megapixels instantly.
Image Aspect Ratio Calculator
Read an image aspect ratio and calculate matching dimensions for 16:9, 4:3, 1:1, 4:5 and custom ratios.
Image Color Palette Generator
Extract a practical dominant color palette from an image and copy HEX, RGB, CSS or JSON values.
Image Hash & Perceptual Fingerprint Comparator
Generate SHA-256 plus aHash, dHash and pHash locally, or compare two images with Hamming distance to screen for exact and near-duplicate candidates.
Remove Image Metadata
Create a clean image copy without embedded camera and editing metadata by re-encoding it in your browser.
Image Contact Sheet Generator
Combine many images into a labeled thumbnail sheet for review, selection, proofing and comparison.

Optimization and upload preparation

Optimize Image for Web
Optimize images for websites by balancing dimensions, format and compression. Create lighter web-ready images with measurable savings.
Compress Image for Upload
Make an image fit a file-size limit before uploading it to a form, portal, website or application. Set the maximum KB or MB and verify the result.
Image Compression Checker
Check an image’s file size, dimensions, format, compression ratio and optimization opportunity before deciding what to change.
Image Optimization Checker
Analyze an image for website, email and upload readiness and get practical recommendations for dimensions, format and compression.

Photo Size & DPI Tools

2 × 3 cm
236 × 354
35 × 45 mm
413 × 531
3.5 × 4.5 cm
413 × 531
4 × 5 cm
472 × 591
2 × 2 inches
600 × 600
1 × 1 inch
300 × 300
2 × 3 inches
600 × 900
3 × 4 inches
900 × 1200
4 × 6 inches
1200 × 1800
Passport photo 35 × 45 mm
413 × 531
Passport photo 2 × 2 inches
600 × 600
Visa photo 35 × 45 mm
413 × 531
Visa photo 2 × 2 inches
600 × 600
ID photo 35 × 45 mm
413 × 531
ID photo 2 × 2 inches
600 × 600

Choose an image tool by requirement

Start with the rule you were given instead of guessing at a compression slider. A KB limit calls for a target-size tool; a pixel requirement calls for an exact-dimensions tool; a print requirement needs physical size and DPI; and a format requirement needs a converter.

Need an image under 100KB?Use the 100KB target page.Need exact pixels?Start with an exact-dimension page.Need a print/photo size?Calculate pixels from physical dimensions and DPI.Need another format?Convert JPG, PNG and WebP files.

Popular exact-size image targets

20KB50KB100KB200KB500KB1MBJPG 100KB

Common use cases

  • • Government, exam and admission forms with KB limits.
  • • Job applications and profile-photo uploads.
  • • Website images that need smaller downloads.
  • • Print photos where DPI and physical size matter.
  • • Converting images for compatibility or web delivery.

Prepare a passport-style photo

Start with the current instructions from the passport, visa, exam or application portal. Crop the photo to the required aspect ratio, then match the specified physical size or pixels, followed by the file-size and format limits. Requirements vary by destination, so do not assume that one photo size works everywhere.

  1. 1. Check the official photo dimensions, format and KB limit.
  2. 2. Use the matching print-size or pixel-size tool.
  3. 3. Compress only after the dimensions are correct.
  4. 4. Verify the final file before uploading.
35 × 45 mm600 × 800 px100KB

Prepare a signature image

Signature uploads are destination-specific. Check the portal's required pixels, physical dimensions, format and maximum file size before editing. Crop closely around the signature, resize to the required dimensions, then compress to the required KB limit without making the signature difficult to read.

  1. 1. Record the exact portal requirements.
  2. 2. Crop around the signature and preserve legibility.
  3. 3. Resize to the required pixels if specified.
  4. 4. Compress and verify the final format and file size.
Resize pixels50KB100KB

Frequently asked questions

Can I compress an image to an exact KB limit?

Yes. Choose a target such as 50KB, 100KB, 200KB or 500KB. The target-size tools are designed for forms, applications and upload systems with file-size limits.

What is the difference between compressing and resizing an image?

Compression mainly reduces the data stored in the file, while resizing changes the pixel dimensions. When a strict KB limit is difficult to reach, reducing dimensions can help preserve better visual quality at the final size.

Which image format should I use?

JPG is a practical choice for photographs and broad compatibility. PNG is useful when lossless quality or transparency matters. WebP can provide smaller files for supported web workflows.

Can I prepare photos for an online application?

Yes. Start with the destination requirements, then use a target-size page for the KB limit and a pixel or print-size page when the form also specifies dimensions. The destination instructions always take priority.

Are the image tools useful on phones?

The pages are designed for modern mobile browsers. For sensitive documents or photos, check the individual tool privacy behavior before processing.