Add a clean border to any image
Solid color borders with adjustable width, alpha, and optional rounded corners. Runs locally.
image/* · runs locally · nothing uploaded
How it works
Pick an image, tune the options, then download the result. Everything runs in your browser.
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Pick an image
Any PNG, JPEG, or WebP works. Transparency is preserved when possible.
Files stay in memory as an
HTMLImageElement— the original bytes are never uploaded, and EXIF metadata is preserved until you explicitly transform it.inputuploadcanvaslocaldecodeinput · bytesimage · loadedload: image/*
loaded · decodedcanvas · ready - 02
Set border width
Slide from 0 to 200 px. The border is added evenly on all four sides.
Encoder quality is exposed where the format supports it — JPEG and WebP get a
0–1quality slider; PNG is lossless. Options re-render the canvas immediately.widthoptionslive previewencoderqualitywidth · tunable24px · livepad = 24px
options applied · liveencoder · live - 03
Color and alpha
Pick any color and set transparency between 0 (clear) and 1 (solid).
Pixel work runs on the Canvas 2D context —
drawImageresamples with the browser’s bilinear filter andgetImageData/putImageDataback per-pixel passes.colorrenderCanvas 2Dpreviewpx-perfectcolor · resampled#ffffff · px-perfectfill = rgba(#ffffff, 1.00)
preview · livepx-perfect - 04
Round corners
Optional radius applied to both the border and the clipped image.
Downloads ship via a hidden anchor with an object URL — no server round-trip, and the file on disk is untouched. The output filename inherits a sensible suffix.
radiusdownloadblobclient-sideobject URLradius · blob0px · savedcorner-radius = 0px
clipped · ready to shipsuccess
Browser-only image work that scales
Convert with quality control
JPEG/WebP let you pick a 0–1 quality. Default 0.92 is a good compromise of size and visible quality.
PNG isn’t free
Use PNG only for transparency or sharp edges. For photos, WebP is smaller at the same perceived quality.
Strip EXIF for privacy
Photo EXIF often contains GPS, camera model, and timestamps. Strip before sharing public uploads.
Watch the colour profile
Convert to sRGB before web export. Wide-gamut images render oversaturated in non-managed browsers.
AVIF when it’s available
AVIF beats WebP on size at the same quality. Detect support via <picture> with fallbacks.
Lazy-load below the fold
Add loading="lazy" on <img>. The browser handles scheduling — no IntersectionObserver needed.
When to use this tool
Common workflows it speeds up.
Instagram frames
White polaroid-style borders for socials. Decoded into a Canvas 2D context — original bytes never leave the tab, so you can process customer-uploaded photos, internal screenshots, or sensitive diagrams without privacy concerns.
px-perfectAvatar rings
Color-coded rings around profile photos. Encoders expose quality 0–1 where the format supports it (JPEG, WebP); PNG and AVIF stay perceptually lossless. Pick 0.85 for web, 0.95 for archival, 0.7 for thumbnails.
quality-tunablePrint mat
Mat-style padding before printing or framing. Pair with the EXIF Stripper before sharing user-uploaded photos publicly. Camera serial numbers, GPS coordinates, and timestamps often hide in image metadata and leak more than the picture itself.
format-awareApp screenshots
Subtle border so screens stand out on light backgrounds. Output preserves colour profile (sRGB) so it renders consistently across browsers, monitors, and print pipelines. Wide-gamut workflows can opt into Display P3 for modern Apple devices.
EXIF-safeVintage badges
Thick rounded frames for retro covers. Re-runs only on option changes, never on window resize, so the canvas stays responsive on large images. drawImage uses the browser's bilinear filter for fast resampling.
client-sideOG images
Branded border on social-share thumbnails. Downloads as .png, .jpg, .webp, or .avif with the correct MIME so editors apply native handling on save. The filename inherits a sensible suffix derived from the input.
compression-readyFrequently asked questions
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