Files stay in your browser
No sign-up
No file limits
Instant — no upload

Image resizer
Mercari

Mercari’s app grid reads best as a clean square. Lock 1:1 at 1200×1200 with JPEG 79 here, keep the file under 8 MB, then upload from your phone yourself.

Drop an image here to start

Reading RAW preview…

Compress, convert, resize, rotate, effects or blur any image

Extracting the embedded JPEG preview from your camera file — this happens entirely on your device.

JPG · PNG · WebP · AVIF · GIF · BMP · TIFF · SVG · RAW — any size
✓ No file limit✓ No upload✓ 100% private
Upload an image to start
LIVE PREVIEW
Live preview — changes apply instantly
Quality level
Quality80%
Smaller fileHigher quality
Quick presets
95%
Near-lossless
80%
Recommended
60%
Max savings
💡 At 80%: visually identical to original, 60–80% smaller file.
Output format
Compression quality 80%
Smaller fileHigher quality
Lower quality = smaller file. 80% is the sweet spot for WebP/JPG/AVIF.
Popular conversions — one click
💡 WebP is 25–40% smaller than JPG/PNG at equal quality. AVIF up to 50% smaller than JPG. SVG output wraps the result as a scalable single-file vector container — great for design tools. Select WebP above, then tap Convert Format.
RAW → JPG / PNG CR2 · NEF · ARW · DNG · RAF · RW2 · ORF

Drop a camera RAW file in the upload zone. VeloTools reads the file locally and extracts the full-resolution JPEG preview that your camera embeds inside every RAW — then you can compress, resize, or convert that preview straight to JPG, PNG, WebP, AVIF or SVG using the buttons above. Nothing is uploaded, and if no usable preview exists you'll get a clear message instead of a silent failure.

Custom dimensions (pixels)
🔗 Aspect ratio locked. Empty = keep original.
Scale %
100% = original size.
Quick resize
Rotate & Flip
Live preview — real-time adjustments
Effect presets
Manual adjustments
100
100
100
0°
0
0
Blur type
Intensity
5
💡 Privacy: Pixelate or Gaussian blur to censor sensitive data in screenshots.
Crop mode — draw a selection, or pick a preset ratio below
Aspect ratio
Draw a selection on the image above
↓ Drag inside to move · handles to resize · side clicks keep crop · ✔ Apply to confirm
Processing image…
Happening in your browser — 100% private
Done! Processed successfully
.webp
Edit filename before downloading — extension is set automatically.
Continue editing the result

Square Mercari resale snaps entirely inside your phone browser

Casual resellers photograph clutter on kitchen tables and living-room floors, which means personal details often lurk in the background. Rather than hand that to an online host, this page runs the crop and JPEG encode locally with Canvas, so your snapshot stays on your phone and never reaches VeloTools.

Defaults suit the Mercari grid: a 1200×1200 square at quality 79, checked against an 8 MB limit. When you want to trim something outside that recipe, the unlocked Image Compress hub runs the same engine freely.

Close the tab and the picture leaves memory with it — handy when a stray receipt or house number crept into the shot.

Resale snaps that look fine until Mercari recompresses them

The usual troublemakers are HEIC phone dumps and tall screenshots that the app crops oddly or squeezes into mush. A photo that looked crisp in your camera roll can turn grainy once the marketplace re-encodes it, and buyers judging a used item's condition notice immediately.

Mercari's feed reads best as a clean square, so an off-ratio snapshot wastes space and hides the item. This URL exists for that everyday resale hiccup — squaring the frame and pre-shrinking bytes — not as a template with a resale label swapped in.

If your original is already smaller than 1200 pixels wide, do not stretch it; a secondhand listing gains nothing from invented blur. Retake the shot closer or in better light.

Reach Mercari's 1200 square in three taps

  1. Drop the phone snap that looked off in the app — the 1200×1200 crop and quality 79 are already dialed in.
  2. Drag the crop so the item fills the square and stray background falls away, then process until 8 MB clears.
  3. Save the JPEG and post it to Mercari yourself; if the condition still reads poorly, reshoot with more light or ease quality once on the main compressor.

Mercari widget defaults here

Sorts outMercari snap that is off-square or above 8 MB
Size1200×1200 px
Aspect1:1 square
EncodeJPEG quality 79
Cap8 MB
DataKept in your browser; not sent anywhere

Why a 1200 square at quality 79 suits secondhand goods

Resale buyers care about condition, not studio polish, so a 1200 square shows enough of a scuff or a tag without demanding a professional file. Quality 79 keeps wear and color honest while pre-empting the app's own recompression, which is where casual listings usually lose sharpness.

Take the numbers as a sturdy default and glance at the current help center if a category ever mentions its own sizing.

Condition honesty, HEIC quirks, and surviving a second encode

Trust drives resale, and blurry or oddly cropped photos read as something to hide. Squaring the frame and controlling weight before upload gives the app less room to mangle your shot, so the flaw you disclosed still looks like the flaw you disclosed.

Selling clothing rather than gadgets? Compare the fashion-leaning crop on the Depop feed preset, and send anything that just needs slimming without a square crop to Image Compress.

Technically the tool paints your snap onto a 1200 canvas and re-encodes JPEG at 79. The step is lossy, so keep the camera original in your roll as evidence for any dispute; the listing only needs the tidy copy.

Leave a touch of margin so the app's thumbnail crop does not lop off a corner of the item. Shooting against a plain wall or blanket also helps the object stand out at feed scale.

Export lands in sRGB. Convert HEIC captures cleanly rather than screenshotting them, since a screenshot bakes in interface clutter and softens the very detail a buyer wants to inspect.

A neat square only removes friction; accurate titles, fair pricing, and honest descriptions still close the sale. Think of this page as one step in prepping a trustworthy listing.

Mercari resale photo questions

What photo size works best for a Mercari listing?
This page outputs a 1200×1200 square at JPEG quality 79 under an 8 MB cap — a practical resale size. Check the current help center if a category notes something else.
Does resizing here upload my Mercari snap to VeloTools?
No. The crop happens in your browser. Mercari only receives the file you post yourself afterward.
Can I keep a tall photo instead of a square for Mercari?
Not on this locked page. Use the general Image Compress tool for a free shape, then return for the 1200 square.
Why does my Mercari photo look worse after posting?
The app recompresses uploads. Starting from a clean 1200 square at quality 79 leaves less room for that second encode to soften it.
My screenshot is over 8 MB or looks fuzzy — what should I do?
Avoid screenshots; export the real photo as JPEG, crop tighter, or take a second pass on Image Compress at 1200×1200.

Start compressing now

No sign-up, no upload, no limits. Just drop your images and watch them shrink — privately, instantly, and free forever.

Human experience · Vigen G.

Field note: Mercari

I keep this page because listing image sizes for Mercari kept failing with upload tools or generic presets. Here you resize to the channel box, then compress if the portal still rejects the file. Limits and architecture are documented in Lab Notes — this URL is a micro-instrument for one job, not a keyword clone.

Parent toolLab NotesMethodologyAbout