Popular
Image Fixer
Compress JPG, PNG, WEBP files to exact KB limits for all exam portals.
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Precision Client-Side File Optimizer • Zero Retries
KBFixer: Hit Exact KB
On The First Try.
Type 20KB, get 20KB. Zero guessing, zero rejections at UPSC, SSC, IBPS, and state entrance portals. Completely executed inside your browser RAM.
Instant Exam Presets:Click to run immediately
Exam Spec
Sign Clean-Up
Isolate signatures to pure black on white paper and lock under 20KB.
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Pixel Lock
Dimension Cropper
Lock exact passport pixel aspect ratios (200x230 px) with zero distortion.
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Zero Upload
PDF Visual Engine
Merge or split marksheets and documents with visual page inspection in RAM.
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Instant
PDF Optimizer
Compress bank statements and certificates under strict portal thresholds.
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Word Resizer
Compress DOCX documents instantly without damaging fonts or formatting.
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PPT Compressor
Shrink heavy slide presentations inside browser memory for fast email attachments.
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Zero-Cloud RAM Processing
Your sensitive documents never leave your browser. Identity cards and marksheets remain strictly confidential.
Instant Execution
Zero network upload or download delay. Local WebAssembly pipelines process multi-megabyte files in milliseconds.
Magic Byte Verification
Every exported file includes clean headers and magic byte validation to prevent upload rejections on government gateways.
Official Examination Portal Guidelines Reference
Presets configured according to standard public service commission directives.
| Examination Gateway | Photograph Requirement | Signature Requirement |
|---|---|---|
| UPSC Civil Services | 20 KB to 300 KB (350x350 px) | 20 KB to 300 KB (1000x1000 px) |
| SSC CGL / CHSL / GD | 20 KB to 50 KB (3.5x4.5 cm) | 10 KB to 20 KB (4.0x2.0 cm) |
| IBPS / SBI Banking | 20 KB to 50 KB (200x230 px) | 10 KB to 20 KB (140x60 px) |
| NTA NEET / JEE Main | 10 KB to 200 KB (Passport Size) | 4 KB to 30 KB (White Background) |
Frequently Asked Questions • KBFixer Engine
What is KBFixer and how does it guarantee exact file sizes?
KBFixer is a browser-native file size optimization platform. Unlike standard online compressors that guess quality levels, KBFixer uses an iterative binary search compression engine combined with HTML5 Canvas and WASM to match your target KB threshold on the first attempt.
Why is client-side processing safer than uploading to cloud servers?
Traditional file compressors upload your private Aadhaar cards, PAN cards, marksheet PDFs, and identity photos to external servers. KBFixer executes all byte processing strictly inside your local machine memory (RAM). Zero bytes are transmitted to any server.
How do I resize an image to 20KB or 50KB for government forms?
Select Image Fixer or Dimension Cropper, choose a quick preset like UPSC Photo (50KB) or SSC Sign (20KB), or enter any custom KB value. The tool locks both aspect ratio and byte boundaries automatically.
Does KBFixer support multi-page PDF compression, splitting, and merging?
Yes. The PDF Visual Engine renders full thumbnail previews of every page in browser memory. You can visually inspect, exclude unwanted pages, extract specific sheets, and merge multiple documents with zero data leakage.