OptiDrop

Compress Image to Exact KB — Free Online, No Upload

Compress your JPG, PNG, or WebP images to any exact file size — 20KB, 50KB, 100KB, or a custom limit. Perfect for passport photos, US visa applications, government portals, WhatsApp, NEET, JEE, UPSC exam forms, and more. Everything runs in your browser; your files never leave your device.

Drop Images Here or Tap to Browse

Supports JPG, PNG, WebP (Max 20 images)

No upload? Seriously. Files never leave your device.
100% Local — your file never leaves this device

What to do next →

Resize to passport size

Set exact passport dimensions at 300 DPI for visa and government forms.

Convert format if needed

Switch between JPG, PNG, and WebP to match portal requirements.

What do you want to do next?

Passport Photo Resizer Background Remover

Compress Images to Exact KB — Free Online, No Upload Required

OptiDrop's Image Compressor is a free online tool that lets you compress your JPG, PNG, and WebP images to any exact file size you need. Whether you need to compress an image to 100KB for a government portal, 50KB for a passport photo, or 20KB for an exam form upload, our smart client-side algorithm preserves maximum visual quality while strictly adhering to your target size limit. Unlike other online compressors, OptiDrop processes everything locally in your browser — your images are never uploaded to any server, making it completely safe for sensitive documents like passport photos, visa applications, Aadhaar cards, and PAN cards.

Perfect for Passport Photos, US Visa, UK Passport, and Schengen Visa

Applying for a US visa, UK passport, Schengen visa, Australian visa, Canadian visa, UAE visa, China visa, Japan visa, or South Korea visa? Many embassy and government portals require your photo to be under a specific file size. OptiDrop includes one-click presets for common passport dimensions: India Passport (413x531 px), US Visa 2x2 (600x600 px), UK Passport (413x531 px), Schengen Visa (413x531 px), NEET/JEE (600x600 px), and more. Simply select a preset, set your target KB, and compress — all in seconds, completely free.

Batch Compression for Multiple Images

Need to compress multiple images at once? OptiDrop supports batch compression of up to 20 images simultaneously. Upload all your files, set a single target size, and download everything as a ZIP file. This is perfect for students uploading multiple documents to exam portals, job applicants submitting forms, or anyone who needs to reduce the file size of several images quickly and efficiently.

Frequently Asked Questions

Open the Compress Image tool, drop your photo, type 100 in the Target KB box (or click the 100 KB preset pill), and press Compress. OptiDrop iteratively adjusts quality and dimensions until your file is under the exact limit you set. This matters because government portals, exam forms, and visa applications strictly reject files that exceed their size limits, causing frustrating upload failures. For example, if you are uploading a passport photo to the Indian passport portal that requires under 100KB, simply drag your image in, click the 100 KB preset, and compress — you will get a perfectly sized file in seconds. Your image never leaves your device because all compression happens locally in your browser using JavaScript, so sensitive documents like passport photos and ID cards remain completely private.
Yes, OptiDrop is specifically designed for passport and visa photo compression. It provides one-click dimension presets for India Passport (35x45mm at 300dpi), US Visa 2x2 inches, UK Passport, Schengen Visa, NEET/JEE exam photos, UPSC/OCI, and PAN Card sizes. This matters because government portals reject photos that do not meet exact file size and dimension requirements, which can delay your application. For example, if you are applying for a US visa, click the US Visa 2x2 preset to auto-fill the correct 600x600 pixel dimensions, then set your target to 50KB and compress. Your passport photo never leaves your browser — all processing is done locally on your device, keeping your identity documents completely secure and private.
Yes, OptiDrop is completely free with no hidden fees, no sign-up walls, no watermarks, and no daily usage limits. Unlike other image compressors that restrict free users to a few compressions per day or add watermarks to output files, OptiDrop lets you compress as many images as you need without any restrictions. This matters because students applying for exams like NEET, JEE, or UPSC often need to compress multiple documents and photos, and paying for each compression is not practical. For example, you can batch compress 20 passport photos at once and download them all as a ZIP file — completely free. Since all compression runs locally in your browser with no file uploads, you also save bandwidth and keep your documents private.
OptiDrop supports JPG, PNG, and WebP as input formats and lets you choose JPG, PNG, or WebP as the output format. JPG is recommended for the smallest file size and is universally accepted by government portals and exam form uploaders. PNG preserves transparency and is ideal for logos or graphics, while WebP offers the best compression-to-quality ratio for modern browsers. This matters because different portals have different format requirements — some only accept JPG, while others may prefer PNG for document scans. For example, if you have a PNG screenshot that is 2MB and need it under 100KB for an exam portal, convert it to JPG during compression to achieve the smallest possible size. All format conversion and compression happens entirely in your browser, so your files are never uploaded to any external server.
Yes, OptiDrop works perfectly for compressing images for WhatsApp profile pictures, status uploads, and shared photos. WhatsApp compresses images automatically on its own, but pre-compressing your photo gives you control over the final quality and ensures faster uploads on slow connections. This matters because WhatsApp has file size limits for profile pictures and status updates, and uploading a large high-resolution photo can be slow and result in heavy server-side compression that degrades quality. For example, if you have a 5MB DSLR photo you want as your WhatsApp display picture, set the target to 100KB or 200KB, choose JPG format, and compress — you will get a sharp, optimized image that uploads instantly. Your photo is processed entirely on your device, so personal images never leave your browser.

Image Compressor — About This Tool

OptiDrop Image Compressor reduces your JPG, PNG, or WebP photos to any exact file size you specify — whether that is 20KB for a PAN card upload, 50KB for a passport photo, or 100KB for a government portal. It is designed for students, job applicants, and anyone who needs pixel-perfect, size-controlled images without losing visible quality. All compression happens locally in your browser, so sensitive documents like passport photos and ID cards never leave your device.

How to Use Image Compressor

  1. Drag and drop your image (or tap to browse). You can add up to 20 images for batch compression.
  2. Set your target file size by typing a KB value or clicking one of the preset pills (20 KB, 50 KB, 100 KB, 200 KB).
  3. Optionally choose an output format (JPG, PNG, or WebP) and set exact pixel dimensions using the Advanced Settings panel.
  4. Click Compress All, wait a few seconds, then download each file individually or grab everything as a ZIP archive.

Frequently Asked Questions

What image formats does OptiDrop support for compression?

OptiDrop accepts JPG, PNG, and WebP images as input. You can choose to output the compressed file in any of these three formats. JPG is recommended when you need the smallest possible file size and is universally accepted by government portals, exam form uploaders, and job application websites. PNG preserves transparency and is better for logos or graphics, while WebP offers the best compression-to-quality ratio for modern browsers. All format conversion and compression happen entirely in your browser, so your files are never uploaded to any server.

Can I use this tool to compress passport photos to the required size?

Yes. OptiDrop includes one-click dimension presets for India Passport (35x45 mm at 300 DPI), US Visa 2x2 inches, UK Passport, Schengen Visa, NEET/JEE exam photos, UPSC/OCI, and PAN Card. Select the preset that matches your application, set the target KB limit, and compress. The tool adjusts both image dimensions and quality to meet the exact requirements, which prevents upload rejections on strict government portals. Your passport photo stays on your device the entire time.

How do I compress images for WhatsApp profile pictures?

Simply upload your photo and set the target to 100KB or 200KB using the preset pills or the manual input field. WhatsApp compresses images automatically on its servers, but pre-compressing your photo yourself gives you control over the final quality and ensures faster uploads on slow mobile connections. For example, a 5MB DSLR photo compressed to 100KB will upload instantly and still look sharp as a display picture. The compression runs locally in your browser, so personal images never leave your device.

Will compressing images reduce their visual quality?

OptiDrop uses an iterative algorithm that finds the highest quality level that still fits within your target file size. For most photos, the visual difference between the original and the compressed version is imperceptible at normal viewing sizes. The tool intelligently adjusts JPEG quality and, if needed, scales down dimensions slightly. You can also lock exact dimensions in the Advanced Settings to prevent any resizing. Since you choose the target size, you control the quality-versus-size trade-off entirely.

Can I batch compress multiple images at once?

Yes, OptiDrop supports batch compression of up to 20 images in a single session. Upload all your files, set one target size that applies to every image, and click Compress All. A progress bar shows the status of each file in real time. Once complete, you can download individual compressed images or download everything at once as a single ZIP archive. This is especially useful for students uploading multiple documents to exam portals or professionals preparing batches of images for web use.