19 small tools that run right in your browser: image compression, PDF, QR codes, text, crypto, hashing, JSON, timestamps, regex. No sign-up, nothing uploaded.
Ordered by what you used recently
PDF toolkit, image compression, watermarking and QR codes you can create or scan — files never leave your machine.
Batch-compress PNG, JPG and WebP, resize and convert, with before/after sizes.
Stamp a text watermark on a batch of photos — position, opacity, rotation and tiling, with a live preview.
Convert PDFs to images and back, with multi-page batch export and merging.
Merge, split, delete, reorder, rotate and watermark — six jobs in one page.
Turn a URL or text into a QR code with adjustable size and error correction.
Read the URL, Wi-Fi password or contact card inside a QR image — decoded locally.
AES, hash checking, steganography, password and token generation — all local.
25 algorithms: Base64 / Base32 / Hex encoders, digests up to SHA-512, HMAC signing, AES and XTEA encryption, plus the Chinese standard SM2 / SM3 / SM4.
Hide text in image pixels, optionally password-protected, exported as lossless PNG.
Strong passwords from the browser’s secure random source.
encodeURIComponent in both directions, for special characters in API parameters.
Generate MD5 and SHA digests, compare checksums, and compute HMAC.
Hex tokens, Base64URL secrets and UUIDs.
Timestamps, JWT decoding and regex debugging — the daily small jobs.
JSON formatting, text diffing and text clean-up — paste and see the result.
Colour conversion, WCAG contrast checks and palette ramps for everyday design work.