FAQ

15 common questions — click to expand.

Author 김지광 (운영자)Last updated bal.pe.kr 마이크로 SaaS
Q1.What is EXIF exactly — and is GPS the only tag I should worry about?
EXIF is hundreds of metadata tags inside JPEG / HEIC. GPS is the most sensitive, but the camera serial number (device fingerprint), timestamp (routine/alibi), and editing software (whether you retouched it) also leak privacy. The default "strip GPS only" handles the worst offender fast; "strip everything" is for anonymity.
Q2.Really, you do not upload my photos? How can I verify?
Open DevTools → Network, then drop files — you will see zero POSTs to exif.bal.pe.kr. The processing libraries (exifr, piexifjs, JSZip, Leaflet) are all open-source and run in your browser. OpenStreetMap tile images are fetched only when you expand the map preview.
Q3.Do you support HEIC? iPhone photos are usually HEIC.
If your browser supports HEIC decoding (current Safari and some Chrome builds), the Canvas re-encode path drops metadata entirely and outputs a clean JPEG. For the most predictable pipeline, convert HEIC → JPG first at heic.bal.pe.kr, then strip here.
Q4.Does KakaoTalk strip EXIF when I send a photo?
Default send resizes and re-encodes (EXIF usually goes). But the "send original" option preserves EXIF as-is — dangerous for secondhand or real-estate photos taken at home. Strip here before you hit send.
Q5.What about Reddit, Instagram, and Facebook?
Instagram, Facebook, and X strip most EXIF on upload. Reddit does strip eventually, but scrapers have been observed reading EXIF during the processing delay (especially r/photography). Strip locally first.
Q6.I'm listing on secondhand / real-estate apps — do I really need to strip?
Yes. These platforms have no public EXIF-strip documentation and behavior varies by app version. Indoor photos carry your home GPS, and cached image URLs may retain EXIF even after you delete the post.
Q7.I want to keep the timestamp but remove GPS only.
That's exactly what the default "strip GPS only" does: GPS and the embedded thumbnail go, everything else (camera, lens, capture time) stays intact — useful for blog posts and portfolios.
Q8.Is the output lower quality than the original?
JPEG: lossless — piexifjs replaces only the EXIF block, pixels untouched. PNG: re-encoded, but PNG itself is lossless. WebP / HEIC: re-encoded at quality 0.92, so file size may differ slightly.
Q9.Any limit on batch size? Can I do hundreds of photos at once?
Processed in batches of 40 with no hard cap; 200–300 files typically run smoothly. Beyond that, browser memory becomes the bottleneck — split into two passes.
Q10.Does it work with Korean file names?
Yes. Names are handled in-browser and stored as UTF-8 inside the ZIP. Korean / Japanese / Chinese all work. Older Windows Explorer ZIP viewers can mangle UTF-8 names — use 7-Zip or Keka instead.
Q11.Can I undo the strip?
Stripped EXIF is gone for good. The tool never overwrites the source — it creates *-no-exif.jpg etc. — but you cannot recover metadata from the stripped output. Keep the original if you may want to revisit.
Q12.Are Copyright / Artist tags removed too?
Only when you pick "strip everything" or enable the "author" category in custom mode. The default (GPS only) preserves copyright tags — safe for portfolios and blog posts.
Q13.Does this strip C2PA / AI-generation provenance tags?
Canvas re-encode paths (PNG / WebP / HEIC) drop every ancillary block including C2PA. The default JPEG path edits EXIF only, so C2PA may remain; "strip everything" removes most ancillary blocks from JPEG too. Note: some platforms prohibit removing AI-provenance tags — check terms before doing so.
Q14.Does it work on mobile (iOS Safari / Android Chrome)?
Yes — current iOS Safari and Android Chrome both work. HEIC decoding is more reliable on iOS; some Android devices fail on HEIC directly, in which case convert at heic.bal.pe.kr first.
Q15.Is there a paid version? Ads are distracting.
Fully free today, AdSense-supported. Ad blockers are allowed and every feature works with them on. A Pro tier (video / PDF metadata, API) is under consideration.