Free file compressor and converter to reduce file size

Compress files and convert PDFs, images, video and audio. Free, in your browser, no signup.

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Files never leave your device
Processed in seconds
No limits, no watermarks
No account required

Why people use SimpleSize for file compression and conversion

A no-nonsense file compressor that respects your time and your privacy.

Runs in your browser

Compression happens locally on your machine. Nothing is uploaded, so your documents and photos stay private.

Fast & free, always

No queues, no daily caps, no paywall for the basics. Drop a file, pick a level, and download in seconds.

One tool for everything

Compress files of every kind: PDFs, JPG, PNG, WebP, HEIC, MP4, MOV and more, without juggling ten different sites.

Compression

Reduce file size without losing quality

Our file compressor strips out the data a file doesn't need: repeated patterns, hidden metadata and detail your eyes won't miss. Your files open, upload and email far faster while looking practically identical. Pick a level and SimpleSize does the rest, right in your browser.

Beat upload limits

Slip under email and upload caps like Gmail's 25 MB without splitting files.

Faster sharing & sites

Lighter files send, back up and load on the web noticeably quicker.

Save storage & data

Fit more on your drive and cloud, and burn less mobile data on the go.

Quality you can't tell apart

Smart presets cut 50–80% of the size while keeping images and text sharp.

Conversion

Convert files to the right format

A free file converter changes your files from one format to another so they work wherever you need them, and SimpleSize keeps colors, resolution and quality intact through the switch. No signup, no watermark, no upload: pick a tool, drop your files and download the result in seconds.

Opens on any device

Swap niche formats for ones every app and phone understands.

iPhone photos, sorted

Turn HEIC shots into universal JPGs you can share anywhere.

Everything in one PDF

Merge a stack of loose images into a single, tidy document.

Web-ready in a click

Export modern WebP and MP4 for pages and clips that load fast.

Questions, answered

Are my files uploaded to a server?
No. SimpleSize compresses and converts files directly in your browser using your device's processing power. Your files are never sent anywhere, which keeps sensitive documents and photos completely private.
Is there a file size or daily limit?
There are no daily limits and no watermarks. The only practical limit is your device's memory for very large videos. Most files of any size process without issue.
How much smaller will my file get?
It depends on the file and the level you choose. PDFs and photos commonly shrink by 50–80% with no visible quality loss on the Recommended setting.
Do I need to create an account?
Not for the core tools. You can compress and convert as much as you like without signing up. An account only adds optional extras like saved presets and batch history.
Is the SimpleSize file compressor free?
Yes. The file compressor is completely free with no limits and no watermarks. You can reduce file size for PDFs, images and videos as often as you need, without paying or signing up.
What files can the file compressor reduce?
The free file compressor shrinks PDFs, images (JPG, PNG, WebP, GIF, AVIF, HEIC, TIFF) and videos (MP4, MOV, MKV, WebM). Each format uses a dedicated compressor tuned to cut file size while keeping quality high.
What does the free file converter support?
The file converter changes images, audio and video between common formats. Upload a file, pick the output format, and download the converted result. Like the compressor, the converter is free and needs no account.
Is the file converter safe for private files?
Yes. Both the file compressor and file converter are built privacy-first. Files are processed and returned without being stored, so your documents, photos and videos stay yours.
How do I compress a file without losing quality?
Use the Recommended level on any compressor. It balances size and quality so the result looks the same to the eye while the file gets much smaller. For maximum quality, pick a lighter compression level.
How do I make a PDF smaller for email?
Open the PDF compressor, drop in your file, and choose a balanced preset. Most PDFs drop well under typical email limits in seconds, with text staying sharp.
Can I compress and convert files on my phone?
Yes. The file compressor and file converter run in any modern mobile browser, so you can reduce file size or change formats on a phone or tablet without installing an app.
Which formats does SimpleSize support?
You can compress PDF, JPG, PNG, WebP, GIF, AVIF, HEIC and TIFF images, plus MP4, MOV, MKV and WebM video. The converter also handles audio and video formats like MP3, WAV, AAC and more.
Also from RapidFoundry

When you need to edit, not just shrink

Meet ImgDeal: crop, resize, retouch and edit your images and video right in your browser. The same privacy-first, no-signup approach as SimpleSize, from the same team.

Open ImgDeal imgdeal.com
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