Image resize aur quality loss ke baare mein important points:

• Scale Down (Smaller banana): Quality loss minimal hoti hai. 1920px → 800px resize karne par excellent quality milti hai. Browser Canvas API bilinear interpolation use karta hai — smooth results.
• Scale Up (Bada banana): Quality loss noticeable hoti hai. Image data add nahi hota — existing pixels stretch hote hain, resulting in blur. 2x se zyada upscale avoid karo.
• Output quality: Tool mein quality slider 90% par rakho for best results. JPG/WebP output par quality setting matter karti hai.

Best practices:

• Always resize DOWN — never up if possible
• Original high-resolution image save karke rakho
• Resize ke baad image compress karo for web use
• Text-heavy images PNG output mein save karo — JPG mein text blur hoti hai

Hamar tool mein live preview hai — resize karne se pehle output dekh sakte hain.

Aspect ratio image ki width aur height ka proportion hai — jaise 16:9, 4:3, 1:1.

Lock ON (Default — Recommended):

• Width mein value enter karo — height automatically calculate hogi
• Example: Original 1920×1080 (16:9). Width 800px enter karo → Height automatically 450px hoga
• Image kabhi stretch ya distort nahi hoga
• 🔒 Lock icon orange hoga jab locked

Lock OFF:

• Width aur height independently set kar sakte hain
• Use karo jab specific social media dimensions chahiye (e.g. 1080×1080 Instagram — image crop hogi agar original alag ratio hai)
• Warning: Image stretch ho sakti hai agar ratio match nahi kiya

Tip: Social media presets use karo — yeh automatically correct dimensions set karte hain without distortion.

Instagram different formats ke liye alag dimensions use karta hai:

• Square Post: 1080×1080px — hamar “Instagram” preset use karo
• Portrait Post: 1080×1350px (4:5 ratio) — manually enter karo
• Landscape Post: 1080×566px — manually enter karo
• Story / Reels: 1080×1920px — hamar “Story” preset use karo
• Profile Picture: 320×320px (displays as circle) — manually enter karo

Step by step Instagram resize:

• Image upload karo
• “Presets” tab select karo
• Instagram preset click karo (1080×1080)
• Output format JPG ya WebP select karo
• Quality 90% rakho
• Resize click karo aur download karo

File size tip: Instagram 30MB limit hai, lekin recommended under 1MB hai for faster upload aur better feed quality. Resize ke baad hamar Image Compress tool use karo.

File size (KB/MB) directly control karna resize se possible nahi — file size dimensions + quality + content complexity par depend karti hai. Lekin yeh combination use karo:

File size kam karne ke liye:

• Step 1 — Resize: Hamar tool mein dimensions reduce karo — 1920px → 800px se file size drastically kam hoti hai
• Step 2 — Compress: Hamar Image Compress tool mein quality 70–80% par compress karo
• Step 3 — Format: WebP format use karo — JPG se 30–40% aur PNG se 60–80% smaller hoti hai

Common targets:

• Under 100KB: 800px wide + quality 70% + WebP format
• Under 200KB: 1200px wide + quality 75% + WebP format
• Under 500KB: 1920px wide + quality 80% + JPG format
• Under 1MB: 2560px wide + quality 85% + JPG format

Exact file size target ke liye multiple iterations try karo — resize → compress → check size → adjust.

Multiple images ek saath resize karne ke liye:

• File picker mein Ctrl+Click ya Shift+Click se multiple images select karo
• Ya drag and drop multiple files at once
• Settings ek baar set karo — sabhi images par apply hongi
• “Resize Images Now” click karo
• “Download All (ZIP)” se sab download karo

Bulk resize best for:

• Product photo batches for eCommerce (all to 800×800px)
• Blog image optimization (all to 1200px wide)
• Social media content calendar (all to platform-specific sizes)
• App icon generation (multiple sizes from one source)

Note: Bulk mode mein preview nahi hota — single image mode use karo agar preview chahiye pehle.