Browser-only image tool
JPG Compressor Online
UploadReady's JPG compressor reduces JPEG file size to any target — from 10 KB to 1 MB — entirely in your browser. No server upload means your photos stay private. Free forever, no watermark.
JPG compression targets — which size do you need?
| Target size | Typical use case | Direct link |
|---|---|---|
| 50 KB | SBI, IBPS, SSC exam portals | Compress JPG to 50 KB |
| 100 KB | Job applications, identity forms | Compress JPG to 100 KB |
| 200 KB | Government portals, visa applications | Compress JPG to 200 KB |
| 500 KB | Passport applications, web uploads | Compress JPG to 500 KB |
| 1 MB | Email attachments, professional submissions | Compress image to 1 MB |
How JPEG compression works
JPEG uses a lossy compression algorithm that discards image data the human eye is least sensitive to — fine colour details in high-frequency areas. When you lower the JPEG quality setting, the algorithm discards more data, producing a smaller file but with visible artefacts (blockiness, colour banding) at low quality levels.
UploadReady automatically finds the optimal quality level to reach your target file size — you do not need to manually adjust quality percentages. The tool iterates through quality levels until the file fits under your target, maximising quality within the constraint.
JPG vs JPEG — are they the same?
Yes — JPG and JPEG are identical. The format is officially called JPEG (Joint Photographic Experts Group), but early Windows systems limited file extensions to 3 characters, creating .jpg. Modern systems and all image tools treat .jpg and .jpeg as the same format. When a portal says "upload in JPG format," you can upload a .jpg or .jpeg file — they are the same thing.
FAQ
What is the difference between JPG and JPEG?
JPG and JPEG are identical — the same image format. The difference is historical: early Windows limited file extensions to 3 characters, shortening .jpeg to .jpg. All modern tools treat them as identical.
How much quality is lost when compressing a JPG?
From 3 MB to 500 KB: no visible loss. From 3 MB to 100 KB: slight softening on close inspection. From 3 MB to 50 KB: visible artefacts on complex images. For best results at small sizes, reduce pixel dimensions before compressing.
Can a compressed JPG be restored to its original quality?
No. JPEG compression is lossy and irreversible. Always keep a copy of the original before compressing. The compressed version is for sending or uploading — never overwrite your original.
What is the best quality setting for different uses?
Email (under 1 MB): 80–90% quality. Exam portals (50–200 KB): 60–75% with reduced dimensions. WhatsApp (under 500 KB): 70–80% at original dimensions. UploadReady automatically finds the right quality to reach your target.
Is browser-based JPG compression as good as Photoshop?
For practical digital uses (portals, email, web) at 50–500 KB, browser compression is equivalent to Photoshop. Marginal differences only matter for large print applications, not for screen or portal use cases.