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Image Compression Blog

Hands-on guides to shrinking photos and documents for online forms, job portals, email and the web — with the real size limits, sourced and kept up to date.

Latest · How-to

HEIC to JPG for Online Forms: Fix iPhone Photo Uploads

Convert an iPhone HEIC photo to JPG for an online form, then check its file size and pixels. Includes Safari, iCloud and Mac fallback steps.

3 Nov 2026 · 5 min read

How-to 31 Oct 2026

How to Compress a Signature Image to 20 kB for Online Forms

Make a clear signature JPG under 20 kB for an online form. Check the required size range and dimensions, crop safely, and inspect the final download.

Passport Size Photo in Pixels: 3.5 × 4.5 cm at 200 and 300 DPI

3.5 × 4.5 cm is 276 × 354 px at 200 DPI and 413 × 531 px at 300 DPI. Get the formula, a DPI table and the rule for forms that list their own pixels.

File Small Enough but Upload Rejected? Check These Causes

Fix image and PDF upload errors even when the file looks small enough: check exact bytes, format, dimensions, minimum limits and the file you selected.

Image Dimensions vs File Size: Meet Both Upload Requirements

Pixels and kB measure different things. Learn how to meet a form's width, height and file-size limits without stretching a photo or cropping key details.

Compress a PNG Without Losing Its Transparent Background

Keep a logo or cutout transparent while reducing its size. Learn which output format to choose, what PNG can shrink, and how to check edge quality.

Reduce a Scanned PDF's Size Without Making Text Unreadable

A practical workflow for smaller scanned PDFs: improve the source, choose color carefully, budget for page count and inspect small text before submitting.

Compress a PDF and Keep Text Selectable: What to Check

Learn when PDF compression preserves searchable text, when it turns pages into images, and how to check links, forms and readability before uploading.

Best Image Format for Web Performance in 2026: WebP, AVIF or JPEG

JPEG, PNG, WebP, AVIF and JPEG XL compared for 2026 web performance: real file-size savings, browser support figures, a comparison table and a use-case guide.

Bulk Image Compression Guide: Compress Many Photos at Once

When bulk image compression beats one-by-one work, which tools take 200 files at once, how they pick quality, and a six-step workflow for consistent output.

Compress Images for Email Attachments: Limits and Sizes

Compress images for email without bounces: Gmail, Outlook, Yahoo and iCloud attachment limits, the hidden encoding overhead, kB targets and six quick steps.

Why Compress Images for the Web: Speed, SEO and Visitors

Why compress images for web pages? Heavy files slow loading, hurt Core Web Vitals and lose visitors. Page-weight figures, Google's thresholds and kB targets.

Reduce Image Size Without Losing Quality: A Practical Guide

How to reduce image size without losing quality: pick the right format, resize to the pixels you need, and let a kB-target tool find the quality that fits.

JPEG vs PNG vs WebP: Which Image Format Should You Use?

JPEG, PNG and WebP compared: compression type, transparency, typical file sizes and browser support, plus a checklist for photos, logos and portal uploads.

How Image Compression Works: Lossy vs Lossless Explained

How image compression works in plain language: what JPEG and PNG do to your pixels, what lossy and lossless really mean, and how a kB-target tool picks quality.

How to Compress Photos and Documents for Job Applications

Prepare a job-application photo, signature, resume and certificates without upload errors: formats, size targets, dimensions and quality checks.

How to Compress Images for Government Forms Without Rejection

Prepare photos, signatures, thumb impressions and document scans for government forms: size ranges, dimensions, formats and a pre-upload checklist.

How to Compress an Image to 50 kB Without Making It Blurry

Compress a photo, signature or thumb impression to 50 kB: the right pixel dimensions, JPG settings and a step-by-step method for strict upload limits.

How to Compress an Image to 200 kB and Keep It Sharp

Compress a photo or document scan to 200 kB with the right dimensions and format, plus exact steps for portal, profile, email and web uploads.

How to Reduce Passport Photo Size Without Losing Clarity

Reduce a passport-style photo to the file size and dimensions a form accepts while keeping the face clear, the ratio correct and the background clean.

How to Compress an Image to 100 kB: Exact-Size Guide

Make a photo, signature, declaration or scan 100 kB without guesswork: recommended dimensions, format choices and a step-by-step quality check.

Indian Government Website Image Size Requirements: 2026 Guide

Current 2026 photo, signature and certificate upload ranges for major Indian exam and recruitment portals, with source links and preparation advice.

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