targetTarget upload limits

Exact KB Compressor

Use preset targets like 20KB, 50KB, 100KB, or 200KB when a portal rejects files that are too large. This flow is tuned for exam photos, signatures, and other upload limits.

shield100% Client-Side Processing

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Typical use cases

20KB

Useful for signatures and low-ceiling upload forms.

50KB

Common for SSC, IBPS, and banking photo uploads.

100KB-200KB

Better fit for larger document or passport-style images.

Frequently Asked Questions

Does this tool guarantee the exact file size?expand_more

It aims safely under the target so your upload is more likely to pass strict portal validation. If the original image is extremely large, the tool may also shrink dimensions slightly to stay under the requested limit.

Should I use 20KB for both photos and signatures?expand_more

20KB is common for signatures and some photo limits. Many photo uploads allow 50KB or more, so choose the number that matches the form requirement.

What if the photo still looks too soft?expand_more

Start from the correct crop and dimensions first. A tightly framed exam photo will hold up better at small sizes than a full-resolution phone image.

How does JPEG compression actually work?expand_more

JPEG compression uses a mathematical technique called Discrete Cosine Transform (DCT) to divide the image into 8x8 pixel blocks and reduce detail that the human eye is less sensitive to. Lowering the quality setting increases the amount of detail removed, which reduces file size. At quality levels above 60, the visual difference is usually imperceptible.

Why does the same photo compress to different sizes on different tools?expand_more

Different tools use different JPEG encoding libraries and quality scales. A quality of 80 in one tool might not equal 80 in another. Our tool uses iterative binary search to find the exact quality level that produces a file just under your target KB, regardless of the encoding library used.

Can I compress a PNG or HEIC file with this tool?expand_more

Yes. The tool accepts PNG, HEIC, WebP, and JPG inputs. All files are converted to JPEG during compression because JPEG is the format accepted by virtually all exam portals. If you need to keep the PNG format, use a dedicated PNG compressor instead.

Does compression remove EXIF metadata?expand_more

Yes, the compression process strips EXIF metadata including GPS location, camera model, and orientation data. This is actually beneficial for two reasons: it reduces file size by 5-15KB, and it protects your privacy by removing location data from the uploaded photo.

What is the difference between lossy and lossless compression?expand_more

Lossy compression (like JPEG) permanently removes some image data to achieve smaller file sizes. Lossless compression (like PNG) preserves all original data but achieves much smaller size reductions. For exam portal uploads, lossy JPEG compression is almost always the right choice because the file size limits are strict and the visual quality difference is negligible at the required dimensions.

Exact KB Compression for Government Job & Competitive Exam Applications

When applying for Indian government jobs, university admissions, or nationwide competitive examinations, candidates face strict digital document validation rules. Modern smartphone cameras capture photographs at resolutions of 12 to 48 megapixels, generating file sizes ranging between 3 MB and 12 MB (3,000 KB to 12,000 KB). However, online application portals such as SSC, IBPS, UPSC, NTA NEET/JEE, Railway Recruitment Boards (RRB), and State PSCs enforce strict maximum upload limits-most commonly 20 KB, 50 KB, 100 KB, or 200 KB.

Standard quality sliders or generic photo compressors often fail in two ways: either they compress the photo too aggressively, turning facial features or handwritten signatures into unreadable pixelated blocks, or they fail to hit the exact target ceiling, causing immediate server rejection errors during submission. Our Exact KB Compressor solves this using an automated iterative binary search algorithm. It dynamically calibrates JPEG quantization tables to achieve the maximum possible visual fidelity while guaranteeing that the final output sits safely under your chosen KB threshold.

Quick Solution (TL;DR)

Need your photo or signature under a strict KB ceiling right now? Follow this 3-step workflow:

Step 1: Upload Your Image - Drop your JPG, PNG, HEIC, or WebP photograph or scanned signature file into the workbench above.
Step 2: Select Your Target KB - Click a preset button (20KB, 50KB, 100KB, or 200KB) or enter the exact maximum size specified in your official exam notification.
Step 3: Download Verified Output - Our engine automatically processes and validates the file. Download your optimized JPG that is ready for instant upload without portal rejections.

When Should I Use This? (Specific Exam & Portal Use Cases)

Different examination boards and state government portals enforce different file size windows for passport photos, signatures, thumb impressions, and handwritten declarations. Below is a comprehensive breakdown of official specifications across major recruitment bodies:

Exam / Recruitment Portal	Document Type	Official KB Limit	Recommended Target
SSC (CGL, CHSL, MTS, GD Constable)	Passport Photo & Signature	Photo: 20-50 KB \| Signature: 10-20 KB	Use 50KB preset (Photo) / 20KB preset (Signature)
IBPS & SBI (PO, Clerk, SO, RRB)	Photo, Signature, Thumb & Declaration	Photo: 20-50 KB \| Signature: 10-20 KB \| Declaration: 50-100 KB	Use 50KB preset (Photo) / 20KB preset (Sign)
UPSC CSE (IAS/IPS), NDA, CDS	Photograph & Signature	20 KB to 300 KB each	Use 200KB preset for maximum sharpness
Railway RRB (NTPC, ALP, Group D)	Photograph & Running Signature	Photo: 20-50 KB \| Signature: 10-40 KB	Use 50KB preset (Photo) / 20KB preset (Sign)
State PSCs (UPPSC, BPSC, MPSC, RPSC)	Combined / Single Uploads	Typically 20 KB to 50 KB	Use 50KB preset for combined photos

Real-World Examples: Before & After Compression

Seeing how our compression preserves critical detail helps you understand why binary search optimization outperforms standard resizing:

Scenario A: SSC CGL Photo Upload

Before: A candidate captures a portrait on a smartphone (4000 x 3000 px, 3.8 MB). When submitted to the SSC portal, the form rejects it with the alert: "Photograph file size must not exceed 50 KB."

After: Running the image through the 50KB preset reduces the file size to precisely 48.4 KB. Facial recognition landmarks, eyes, ears, and clothing contrast remain sharp and fully compliant with biometric verification standards.

Scenario B: IBPS Bank PO Signature

Before: A candidate scans a handwritten signature on white paper (800 x 400 px, 165 KB). The IBPS portal rejects it: "Signature size must be between 10 KB and 20 KB."

After: Selecting the 20KB preset optimizes the signature down to 18.6 KB. Pen strokes maintain clean, high-contrast edges without artifacts or background graying.

Troubleshooting Common Upload Rejections

If you still experience upload challenges after compressing your file, check these common portal validation pitfalls:

Error: "File size is below minimum requirement" - Portals like UPSC enforce both a maximum (300 KB) and a minimum threshold (20 KB). If your photo is smaller than 20 KB, the portal will reject it. Choose a target well above the minimum floor (such as 50 KB or 100 KB).
Error: "Invalid image dimensions or aspect ratio" - File size in KB is completely separate from physical pixel dimensions (width x height). If a portal demands 3.5 cm x 4.5 cm (or 132 x 170 pixels), crop your photo using our Passport Photo Cropper first before compressing.
Error: "Only JPG/JPEG format accepted" - Some older portal parsers reject uppercase extensions (.JPG or .PNG). Our tool automatically outputs a clean, lowercase .jpg header accepted by all government servers.

Best Practices for Flawless Exam Uploads

Follow the correct sequence: Always Crop first → Resize dimensions second → Remove metadata third → Apply Exact KB Compression last. Compressing first and cropping later degrades image quality.
Inspect at 100% zoom: Before submitting your application form, open the downloaded compressed image on your device and zoom to 100% to ensure that your face or signature remains clearly identifiable.
Avoid double compression: Always compress from your original high-resolution photo rather than a file that was previously sent via WhatsApp or already compressed.

Privacy Guarantee & Browser Compatibility

100% Client-Side Privacy: Your passport photos, signatures, thumb impressions, and official identity documents are highly sensitive personal data. Our Exact KB Compressor operates entirely within your browser using modern WebAssembly and HTML5 Canvas APIs. Your images are processed entirely in your device memory and are never uploaded, sent, or stored on any external server.

Universal Browser Compatibility: This tool runs seamlessly across all desktop and mobile web browsers, including Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, and Opera on Windows, macOS, Android, and iOS devices. No software installation or browser extension is required.

For a complete reference on photo requirements across Indian exam portals, see our government exam photo requirements guide.

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