CalcTool kmra.dev

More tools from kmra

The same free, private tools for images, PDFs, video and more.

ImgTool

Compress, resize, convert, cut out backgrounds and more. Everything runs on your device.

Open Image tools

CompressSmaller files, same look ResizePixels or presets Remove backgroundTransparent PNG cut-outs Passport photoSized, framed, printable WatermarkText or logo, in bulk Blur facesEvery face, automatically CollageGrids and layouts ConvertHEIC, PNG, WebP to JPG

PDFTool

Merge, split, compress and sign PDFs. Everything runs on your device.

MergeCombine files CompressSmaller files, size limits SignSignature, text, date SplitRanges, pages, extract Image to PDFJPG, PNG to PDF PDF to imagePages as JPG or PNG Organize pagesDrag, rotate, delete Remove pagesDelete pages

VidTool

Compress, convert, trim and record videos in your browser. Everything runs on your device.

Open Video tools

Compress videoSmaller files, set size Convert videoMOV, MKV, WebM to MP4 Trim videoCut start and end Video to GIFClips to GIFs Video to MP3Audio from video Screen recorderScreen, window or tab Resize videoReels, Shorts, square Remove audioSilent copy

AudioTool

Convert, cut, join and clean up audio in your browser. Everything runs on your device.

Open Audio tools

Convert audioMP3, WAV, M4A, FLAC Cut audioKeep the part you need Compress audioSmaller files, set size Video to audioMP4, MOV to MP3 Change volumeLouder or quieter Join audioMany files, one track Voice recorderMicrophone to MP3 Normalize loudnessEven, standard loudness

ColorTool

Pick, convert, mix and check colours, and make palettes and gradients. Everything runs in your browser.

Open Color tools

Color pickerHEX, RGB, HSL, OKLCH Palette generatorSchemes and random Contrast checkerWCAG AA and AAA Gradient generatorLinear, radial, conic Tints and shades50–950 scale Color mixerBlend two colours Color blindnessPreview colour vision Box shadowLayered shadows

DevTool

Format JSON, decode tokens, hash files and convert data. Everything runs on your device.

Open Developer tools

JSON formatterFormat, validate, tree Base64Text and files JWT decoderHeader, payload, expiry UUID generatorv4, v7, ULID Timestamp converterEpoch ↔ date Diff checkerCompare two texts Regex testerMatches, groups, replace Hash generatorSHA-256, MD5, HMAC

QRTool

Make and scan QR codes and barcodes in your browser. No sign-up, no tracking links.

QR code generatorLinks, Wi-Fi, contacts QR scannerCamera or image Barcode generatorEAN, UPC, Code 128 Bulk QR codesOne per line, zipped Wi-Fi cardPrint it for guests QR code checkerTest before you print 2D code generatorData Matrix, PDF417, Aztec Batch scannerMany images, one list

OCRTool

Copy text from images, screenshots and scanned PDFs. Everything runs on your device.

Image to textPhotos, screenshots, scans PDF to textScanned or not Searchable PDFSearch and copy scans Batch OCRMany files, one zip

Drop any file on kmra.dev to see every tool that opens it