HEIC to JPG Under 20 KB
A signature photographed on an iPhone fails portal uploads twice: once for being HEIC, once for being megabytes over a 20 KB cap. This page runs both fixes as one step — native HEIC decode, then exact-size JPG compression that lands at or under 20 KB with the most clarity the budget allows.
Choose your file
Pick a quality mode
Compress
Download
The signature-field double failure
Signature and thumb-impression fields are the strictest uploads on any application portal — many cap them around 10–20 KB, and nearly all of them accept only JPG (sometimes PNG). An iPhone photo of your signature arrives as a multi-megabyte HEIC: the portal either rejects the format outright or, if you convert first with a generic tool, rejects the size next. Two errors, two tools, ten minutes of frustration — for a picture of ink on paper.
This page collapses that into one upload. The HEIC decodes on our servers with a native decoder (no browser support needed), the iPhone’s rotation is baked into the pixels so nothing arrives sideways, and the exact-size engine then searches quality and dimensions for the sharpest JPG that fits at or under 20 KB — the same measured, verified targeting the 20 KB preset page uses for regular photos.
Getting a clean signature from an iPhone camera
The budget rewards preparation. Sign with a dark pen on plain white paper, photograph straight-on in even light, and crop tightly in the Photos app before uploading — background paper spends bytes the pen strokes need. A tightly-cropped signature stays perfectly legible at 20 KB because it only needs a few hundred pixels; a full-page photo squeezed to the same budget will not.
If the target proves physically impossible for a given image, the tool says so before compressing and still delivers the closest possible file — never a silent failure, never a corrupted upload. And when a file is already a small JPG under the cap, it comes back untouched with an honest “already optimized”.
Privacy, batches and the neighbouring sizes
EXIF metadata — including the GPS position of wherever you photographed your signature — is stripped by default, with a keep-metadata toggle for the rare form that wants it. Up to ten files per batch (a signature plus thumb impression plus photo set runs in one go), each with its own download, plus a download-all-as-ZIP button when two or more finish. Files auto-delete within 24 hours.
Photo fields on the same form usually allow more room: HEIC to JPG under 50 KB is the companion page for those. No size cap at all? The plain HEIC converter skips the targeting entirely.
Three steps, no account
Upload the iPhone photo
Drop in the .heic straight from your camera roll — plain JPG and PNG also work if you already converted.
One step: convert + hit 20 KB
The server decodes the HEIC and compresses to the sharpest JPG that fits at or under 20 KB, orientation corrected.
Download and upload to the form
The result is a portal-ready JPG under the signature-field cap, with private metadata stripped.
Frequently asked questions
Can I convert a HEIC signature photo to JPG under 20 KB for free?
Yes — the conversion and the exact-size compression run as one free step, with no signup, no watermark and no conversion counter. Files auto-delete from our servers within 24 hours.
Does this page convert HEIC and compress to 20 KB in one upload?
Yes, that is its whole point: native HEIC decode first, then the exact-size engine compresses the decoded image to a JPG at or under 20 KB — one upload, one download, both portal requirements met.
Will a signature still be readable at 20 KB?
A tightly cropped signature, yes — clearly. It only needs a few hundred pixels, which 20 KB carries at good JPG quality. A full photograph at this size will visibly suffer; 20 KB is a signature budget, not a photo budget.
What happens to the location data in my iPhone photo?
It is stripped by default, along with the rest of the EXIF metadata — a file headed to a third-party portal should not carry the GPS coordinates of your home. A toggle keeps metadata when you genuinely need it.
Can I process several HEIC files at once on this page?
Up to ten per batch. Each gets its own download as it finishes, and a "Download all as ZIP" button appears when two or more complete.
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