Google Web Picture Format (.webp)
RFC मानकWebP is a modern image format developed by Google that provides superior lossless and lossy compression for web images, supporting both alpha transparency and animated frames.
JPG को WEBP में कन्वर्ट करें
मुफ्त इन-ब्राउज़र JPG से WEBP कन्वर्टर। अपने डिवाइस पर तुरंत फ़ाइलें कन्वर्ट करें।
WebP ऑनलाइन कॉम्प्रेस करें
ब्राउज़र में 100% निजी कंप्रेसन — फ़ाइलें कभी भी आपके डिवाइस से बाहर नहीं जाती हैं
इंस्पेक्ट और मेटाडेटा
ऑपरेटिंग सिस्टम और फ़ाइल विश्लेषक शुरुआती बाइनरी बाइट अनुक्रम का निरीक्षण करके WebP फ़ाइलों की पहचान करते हैं:
बाइट-स्तरीय हेडर हस्ताक्षर (मैजिक बाइट्स)
ऑपरेटिंग सिस्टम और फ़ाइल विश्लेषक शुरुआती बाइनरी बाइट अनुक्रम का निरीक्षण करके WebP फ़ाइलों की पहचान करते हैं:
HEX हस्ताक्षर (ऑफ़सेट 0):
52 49 46 46ASCII निरूपण: RIFF
मानकीकरण: RFC 6386 / RIFF Container Specification
तकनीकी विनिर्देश
| कंटेनर आर्किटेक्चर | Resource Interchange File Format (RIFF) container with 'WEBP' FourCC |
| कंप्रेशन | Lossy VP8 predictive intra-frame coding & Lossless VP8L spatial entropy coding |
| बाइट एंडियानेस | Little-Endian for RIFF chunk sizes and container tags |
| कलर स्पेस | sRGB, Embedded ICC Profiles (via VP8X extended header) |
| चैनल और संरचना | RGB + Alpha (8-bit per channel) |
| अधिकतम आयाम | 16,383 x 16,383 pixels (14-bit unsigned integers) |
| पारदर्शिता (Transparency) | Full 8-bit alpha channel transparency in both lossy and lossless modes |
| स्ट्रीमिंग और प्रोग्रेसिव | Progressive decoding supported via incremental VP8 block decoding |
तकनीकी तुलना मैट्रिक्स: WebP बनाम प्रतियोगी
| तकनीकी विशेषता | WebP (वर्तमान) | JPEG | PNG | AVIF |
|---|---|---|---|---|
| Supported Compression Modes | Both Lossy (VP8) and Lossless (VP8L) | Lossy only | Lossless only | Both Lossy (AV1) and Lossless |
| Alpha Transparency | Yes (both lossy and lossless) | No | Yes | Yes |
| Animation Support | Yes (multi-frame with frame delays) | No | Requires APNG extension | Yes (AVIF image sequences) |
| HDR / Wide Color Gamut | 8-bit sRGB only | 8-bit standard | 8-bit & 16-bit | 10-bit & 12-bit native HDR |
| Browser Support | 97%+ global support across all modern browsers | 100% universal | 100% universal | 93%+ modern browsers |
सामान्य करप्शन मोड और हेक्स रिकवरी गाइड
⚠️ Browser fails to display WebP image or shows broken image icon.
मूल कारण: RIFF payload length header (bytes 4-7) does not match the actual byte length on disk.
रिकवरी: Recalculate total file size minus 8 bytes, and patch the 4-byte Little-Endian unsigned integer at offset 0x04.
⚠️ Decoder fails with 'Invalid FourCC: Expected WEBP'.
मूल कारण: Bytes 8-11 do not contain the ASCII characters 'WEBP'.
रिकवरी: Verify offset 0x08 contains 0x57 0x45 0x42 0x50 ('WEBP') and that the chunk header matches 'VP8 ' or 'VP8L'.
सुरक्षा विश्लेषण और पार्सर अटैक वेक्टर्स
WebP parsing gained intense security scrutiny following CVE-2023-4863, leading to widespread sandbox hardening across all major web browsers.
ज्ञात अटैक वेक्टर्स
- CVE-2023-4863: Heap buffer overflow in libwebp's BuildHuffmanTable function when parsing invalid lossless Huffman tables, allowing remote code execution.
- Integer overflow when decoding oversized animation frame canvas dimensions.
सुरक्षात्मक सर्वोत्तम प्रथाएँ: Ensure all client and server libraries use libwebp 1.3.2 or later. Decode WebP files in memory-sandboxed worker threads.
ऐतिहासिक मूल और मील के पत्थर
मुख्य लाभ और खूबियाँ
- Lossy WebP images are 25%–35% smaller than comparable JPEG images at identical SSIM quality.
- Lossless WebP is typically 26% smaller than standard PNG.
- Single unified format handles photos, graphics with transparency, and lightweight animated clips.
तकनीकी सीमाएँ और कमियाँ
- Maximum dimensions capped at 16,383 x 16,383 pixels, preventing ultra-high resolution panoramic imagery.
- Only supports 8-bit color depth (no native 10-bit or 12-bit HDR support).
- Encoding complex lossy images requires more CPU cycles than legacy JPEG encoders.
रोचक तकनीकी जानकारी
- WebP is based on the keyframe intra-prediction algorithms of Google's open-source VP8 video codec.
- The RIFF container used by WebP is the exact same container architecture used by classic Microsoft AVI and WAV files.
- Animated WebP files are typically 60%–80% smaller than animated GIFs.
अक्सर पूछे جانے वाले तकनीकी प्रश्न
Can WebP completely replace both PNG and JPEG?
Yes. For web use, WebP provides superior compression for both photographic content (replacing JPEG) and transparent graphics (replacing PNG). Its universal browser support makes it a primary format for modern web optimization.
Why is WebP lossless compression more efficient than PNG?
WebP lossless uses advanced spatial predictors, color transform decorrelation, a localized color cache, and entropy-coded 2D transforms, resulting in files that are typically 26% smaller than optimal PNGs.
Does WebP support animation?
Yes. WebP supports multi-frame animation with variable frame delays, full alpha transparency per frame, and disposal methods, delivering 60%–80% smaller payloads than traditional animated GIFs.
संबंधित WebP रूपांतरण जोड़े
Convert JPEG photos into modern WebP format to reduce web payload size by 25-35%.
Convert WebP images into universal JPEG format for legacy applications and older device compatibility.
Convert PNG graphics into lossless WebP format to save bandwidth while maintaining full alpha transparency.
Convert WebP images into standard PNG format for editing in graphics software.
Convert Animated WebP image sequences into universally supported animated GIF files.