Bulk Image Compressor & Converter — No Upload Needed
BulkImgConvert
Features
Tools
Compress an image Resize an image Crop an image JPG Converter WEBP Converter PDF Converter Convert HEIC to JPG
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100% private · your images never leave your computer

Compress, resize and
convert images in bulk

Compress, resize, crop and convert your images in bulk, without losing quality. Supports JPG, PNG, WEBP, AVIF, GIF, SVG and PDF.

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JPG
PNG
WEBP
AVIF
Drop your images here
or click to browse your files — multiple files at once
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Output format / convert to ?
Compression method ?
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Number of colors {{ pngColorsValue }}
Image size ?
Scale{{ resPercentValue }} %
Crop
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No image selected
Use the crop icon on the image preview to adjust its area.
Your images stay private and never leave your browser.
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Page {{ f.pageNumber }}
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{{ f.originalLabel }} {{ f.currentLabel }} {{ f.formatLabel }}
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Crop the image
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Before / after
{{ compareAfterImg }}
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Before · {{ compareBeforeLabel }}
After · {{ compareAfterLabel }}

One tool, four operations

Fine-tuned compression, resizing, cropping and conversion — on as many files as you need.

Targeted compression
Quality, percentage of the original, size in MB, or target resolution.
Resizing
Precise dimensions in pixels or quick percentage shortcuts, with lockable proportions.
Cropping
Free-form area or preset ratios (1:1, 4:3, 16:9, 3:2) by drag-and-drop.
Format conversion
JPG, PNG, WEBP, AVIF, GIF, SVG, PDF — in both directions when the browser allows it.

Built for batches, not single files

Most online image tools are designed around one file at a time, then meter you once you need more. This one starts from the opposite assumption: drop in a folder's worth of photos, apply the same treatment to all of them, and download the result as a single ZIP archive. There is no per-batch quota, no account and no paid tier gating the file count, because the work happens on your own machine rather than on a server someone has to pay for.

The practical limit is your device's memory. A few hundred photographs on a normal laptop is routine; the constraint you will hit is patience on very large batches, not a plan.

Nothing is uploaded — and you can verify it

Every operation runs client-side. The codecs that read HEIC, encode AVIF and optimise PNG are compiled to WebAssembly and execute inside your browser, so your files are never transmitted, queued or stored anywhere. If you want proof rather than a promise: load this page, disconnect from the network, and the tool keeps working normally.

That has a side effect worth knowing. Because each image is re-encoded locally, exported files do not carry the original EXIF block — camera model, capture timestamp and GPS coordinates are dropped. For client photographs or anything falling under GDPR, processing that never transmits the file is a different proposition from a service that uploads it and promises deletion afterwards.

Which tool do you need?

Everything below runs on the same workspace above — these pages simply explain each job in more detail.

Compress images →
Cut file size by quality, by percentage, or down to an exact target in MB — useful for page speed and for upload limits.
Resize images →
Set exact pixel dimensions or scale by percentage. Usually the largest saving available, and it costs no visible quality.
Crop images →
Free-form selection or fixed ratios (1:1, 4:3, 16:9, 3:2) for thumbnails and social formats.
Convert to JPG →
From PNG, WebP, HEIC, GIF, SVG or PDF, when you need the format that opens everywhere.
Convert to WebP →
The general-purpose web format: smaller than both JPG and PNG, and it keeps transparency.
Convert to PDF →
Turn images into documents, or merge a whole batch into a single PDF file.