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इमेज रिसाइज़र

Image Resizer — Free Online

Photo resize करें — Passport, Aadhaar, PAN, WhatsApp DP, Instagram, YouTube thumbnail के exact sizes। Custom dimensions भी, quality slider, kabhi upload नहीं।

Image select करें

JPG, PNG, WEBP supported

100% Private — browser में process होता है, कोई upload नहीं

कैसे Use करें?

  1. 1Image upload करें — JPG, PNG या WEBP, browser में preview दिखेगा
  2. 2Quick Preset select — Passport (35×45mm), Aadhaar, PAN, WhatsApp DP, Instagram, YouTube thumbnail
  3. 3या custom Width × Height डालें — pixels में
  4. 4Aspect ratio maintain checkbox tick रखें
  5. 5Output Format select — JPEG (छोटा), PNG (transparency), या WEBP (modern)
  6. 6JPEG में Quality slider से size vs quality balance
  7. 7'Resize करें' दबाएं — output preview और साइज़ दिखेगा
  8. 8'Download' से save — file naming में dimensions automatic

इमेज रिसाइज़र क्या है?

## Image Resizer kya hai Image Resizer एक browser-based tool है जो किसी भी photo को specific dimensions (width × height in pixels) पर resize करता है — government forms (passport, Aadhaar, PAN, driving licence), social media platforms (WhatsApp DP, Instagram square / portrait / landscape, LinkedIn banner, YouTube thumbnail), print requirements के लिए। हर platform की अपनी image dimension specs होती हैं — गलत size upload करने पर forms reject या Instagram automatically crop। हमारा tool 10+ standard presets + custom dimensions support करता है, JPEG/PNG/WEBP output formats — कोई signup, कोई watermark, सब browser में, photos कभी upload नहीं। ## Kaise kaam karta hai Process: image upload → memory में read → original dimensions detect → target dimensions choose (preset या custom) → HTML5 Canvas बनता है target dimensions का → original image canvas पर drawn (bilinear interpolation) → selected format में encode → Blob → download link। Aspect ratio maintain — proportional adjust। Quality slider JPEG/WEBP के लिए (PNG lossless)। PNG transparency preserve, JPEG white BG fill। Upscaling में quality drop natural — AI super-resolution अलग category। ## 5 use cases — Indian context **1. Passport photo:** 35×45 mm @ 300 DPI = 413×531 px। Aadhaar, PAN, voter ID, DL — सब इसी पर। **2. WhatsApp DP / profile photo:** 640×640 square। **3. Instagram post:** Square 1080×1080, Portrait 1080×1350 (best engagement!), Landscape 1080×566। **4. YouTube thumbnail:** 1280×720 — minimum HD। **5. LinkedIn / Facebook:** LinkedIn 1584×396, Facebook 820×312। ## Common mistakes **1. Aspect ratio break:** Square को 35×45 mm में force करने पर distort। Crop पहले square में, फिर resize। **2. Upscaling se HD expect karna:** 100×100 → 2000×2000 = pixelation। **3. PNG mein massive size:** Pure photo में JPEG 5-10× छोटा। **4. JPEG quality 100% always:** 90 और 100 visual difference imperceptible, file size 30-40% बढ़ता है। **5. DPI math galat:** 35×45 mm @ 300 DPI = 413×531 px। ## Pro tips for resizing **1. Crop before resize। **2. Original high-res source। **3. Maintain aspect ratio unless intentional। **4. JPEG 85-92% sweet spot। **5. WEBP modern web (25-35% smaller)। **6. PNG only when transparency। **7. Mobile-first thinking — Instagram portrait 1080×1350 better engage। **8. Govt forms exact spec match। **9. Privacy — सब browser में। ## Modern context — 2026 mein image dimensions 2026 में हर platform की specs evolve: Mobile-first (Reels 1080×1920 + portrait posts dominate), Govt digitization (e-KYC, DigiLocker exact dimensions), HD push (WhatsApp HD 2024), WEBP adoption, AI super-resolution (Topaz, Adobe), Privacy concerns (cloud resizers servers पर भेजते हैं — sensitive content risky)। Browser-side tools यही gap fill। 12MBC combo में productivity, AI tools master करना — content creators, sellers, students के लिए practical guides।

Formula / तरीका

Aspect ratio: width/height. Maintain: newHeight = (newWidth/originalWidth) × originalHeight. Government photo: 35×45mm @ 300 DPI = 413×531 px. Aadhaar: 3.5×4.5cm = 413×531 px. PAN: 2.5×3.5cm = 295×413 px. Instagram square: 1080×1080. Portrait: 1080×1350. Landscape: 1080×566. WhatsApp DP: 640×640. YouTube thumbnail: 1280×720.

Tips और सुझाव

  • •Crop पहले करें (subject center पर), फिर resize
  • •Aspect ratio maintain checkbox on रखें
  • •Govt forms (Aadhaar, passport) के लिए exact preset
  • •JPEG quality 85-92% sweet spot
  • •WEBP modern format — JPEG से 25-35% छोटा
  • •PNG sirf transparency चाहिए तब
  • •Upscaling से HD नहीं बनती
  • •Mobile Instagram में portrait 1080×1350 better engage

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अक्सर पूछे जाने वाले सवाल (FAQ)

Passport size photo kya dimensions par chahiye India mein?
Govt of India spec: 35 mm × 45 mm @ 200-300 DPI = 275-413 wide × 354-531 tall pixels। हमारा 'Passport Photo' preset 413×531 px @ 300 DPI। Background white plain। Face neutral expression, both eyes open, no glasses, no headwear (religious exception)। Coverage 70-80% photo height। File size <500 KB। Same dimension Aadhaar, voter ID, DL, PAN सब के लिए valid। Common mistake: smartphone selfie distance गलत — arm-length, plain wall, फिर crop + resize।
Aspect ratio maintain karne ka matlab kya hai?
Aspect ratio = width:height ratio। 1920×1080 = 16:9 (1.78)। Maintain on: width बदलने पर height proportionally adjust — distort नहीं। Off: independent set कर सकते हैं — squeezed/stretched। Off करें जब specific platform non-standard ratio। On रखें (95% cases) — portraits, landscapes, group photos। Pro shortcut: crop पहले aspect ratio match करें, फिर resize।
JPEG vs PNG vs WEBP — kab konsa use karein?
JPEG: photos default — 5-10× smaller than PNG। Lossy but quality 90+ imperceptible। PNG: transparency चाहिए तो only choice। Lossless। 5-10× JPEG से बड़ी। WEBP: modern (Google), JPEG से 25-35% छोटा + transparency। Cons: कुछ purane apps recognize नहीं। Decision: photo no transparency → JPEG. transparency → PNG/WEBP. web/blog → WEBP. compatibility → JPEG. Default JPEG 90% practical।
Instagram, WhatsApp, YouTube ke liye exact sizes?
Instagram: Square 1080×1080, Portrait 1080×1350, Landscape 1080×566, Story 1080×1920। WhatsApp: Profile 640×640, Status 1080×1920। YouTube: Thumbnail 1280×720 (max 2 MB), Banner 2048×1152, Logo 800×800। Facebook: Cover 820×312, Profile 170×170। LinkedIn: Profile 400×400, Banner 1584×396। Twitter: Header 1500×500, Profile 400×400, Tweet 1200×675। हमारे presets इन सब के लिए optimized। Pro tip: Instagram portrait 1080×1350 30-50% ज़्यादा engagement।
Image upscale karne se HD ban jaata hai kya?
नहीं — naive upscaling (Canvas) image को सिर्फ stretch करता है। 100×100 → 1000×1000 actual information same, bigger pixels (pixelation)। Bilinear interpolation smoother but blur add। Real HD upscaling = AI super-resolution: Topaz Gigapixel, Adobe Super Resolution, Upscayl (free), Bigjpg। ML detail 'hallucinate' — 4×, 8× possible। Faces accuracy higher, text errors। Practical: 1080→2000 = no benefit; 300→1080 → AI tool।
File size kaise kam karein quality kam kiye bina?
Strategies: format change (PNG→JPEG, JPEG→WEBP), quality 100→90% (size 30-40% drop), dimensions reduce, metadata strip (EXIF auto-removed in re-encode), sRGB color profile। Combo example: 5 MB JPEG → 1920×1440 + JPEG 88% → ≈400 KB, 12× compression। Use cases: WhatsApp share, email attachment, website upload।
Tool privacy safe hai? Mera photo upload toh nahi hota?
100% private — कोई upload नहीं। Pure browser-side: image FileReader से memory में → Canvas resize CPU पर → Blob download → page reload पर memory clear। Verify: DevTools → Network tab → कोई outbound request नहीं। Why matters: passport, Aadhaar, family photos — sensitive content cloud upload risky। हमारा tool इस gap के लिए। कोई signup, कोई tracking।
Bulk multiple photos resize ho sakti hain ek baar mein?
Currently एक-एक process। Batch future enhancement में। For 10-20 photos: rapid sequence — हमारे tool पर 5-10 sec/photo। For 50+: Photoshop Actions, ImageMagick CLI `mogrify -resize 1080x1080 *.jpg`, Squoosh CLI, Python Pillow। For 5-15 photos: हमारा manual tool sufficient — 1-2 min total।

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