🆕 New
Total Count: 60
Pay Pal Fee Calculator
Calculate Pay Pal fees
Yu'e Bao Revenue Calculator
Calculate estimated revenue for Yu'e Bao
Credit Card Rate Calculator
Calculate real annual rate for credit card installments
Installment True APR Lookup Table
Free online lookup table for credit card and Huabei installment fee rates — instantly compare the true effective APR (IRR) for every rate tier, with CSV export.
Amount to Chinese Uppercase
Free online tool to convert a number into formal Chinese uppercase currency text — for invoices, contracts, receipts, and other financial documents.
IRR Calculator
Calculate Internal Rate of Return for investment projects
Compound Interest Calculator
Free online compound interest and investment return calculator.
2026 Tax Calculator
Calculate personal income tax and net salary
Loan Interest Calculator
Calculate loan interest based on amount, term and rate
Interest Rate Converter (D/M/Y)
Free online interest rate converter — switch between daily, monthly, and annual rates.
Frequency Tone Generator
Generate audio signals at specific frequencies.
White Noise Generator
Generate white noise audio files.
Audio to AC3
Batch convert audio files to AC3 Dolby Digital format. Supports multiple input formats with customizable quality, sample rate and channels.
Audio to Opus
Batch convert audio files to Opus modern audio format. Supports multiple input formats with customizable quality and channels.
Audio to AAC
Batch convert audio files to AAC format. Supports multiple input formats with customizable quality, sample rate and channels.
Audio to M4A
Batch convert audio files to M4A format. Supports multiple input formats with customizable quality, sample rate and channels.
Audio to OGG
Batch convert audio files to OGG open audio format. Supports multiple input formats with customizable quality, sample rate and channels.
Audio to PCM
Batch convert audio files to PCM raw audio data. Supports multiple input formats with customizable sample rate and channels.
Audio to FLAC
Batch convert audio files to FLAC lossless format. Supports multiple input formats with customizable sample rate and channels.
Audio to WAV
Batch convert audio files to WAV lossless format. Supports multiple input formats with customizable sample rate and channels.
Audio to MP3
Batch convert audio files to MP3 format. Supports multiple input formats with customizable quality, sample rate and channels.
Audio Looper
Online audio looper, repeats audio a specified number of times (2-100). Supports video upload with automatic audio extraction, customizable output format, quality, sample rate and channels.
Audio Speed Changer
Online audio speed changer, changes playback speed without changing pitch (0.5x-8x). Supports batch processing and video upload with automatic audio extraction, customizable output format, quality, sample rate and channels.
Audio Reverser
Online audio reverser tool, plays audio backwards in time. Supports batch processing and video upload with automatic audio extraction, customizable output format, quality, sample rate and channels.
Audio Player
Free online audio waveform viewer and playback tool.
Audio Volume Changer
Online audio volume adjuster. Batch change audio volume (0-10x), supports video upload with automatic audio extraction, customizable output format, quality, sample rate and channels.
Audio Compressor
Online audio dynamic range compressor, automatically balances loud and quiet sounds for more even volume. Supports batch processing and video upload with automatic audio extraction, customizable output format, quality, sample rate and channels.
Audio Extractor
Extract audio from video files in batch. Supports MP3, WAV, AAC, OGG, AC3, FLAC, Opus, PCM, M4A output formats with customizable bitrate.
Audio Format Converter
Online audio format converter supporting MP3, WAV, AAC, OGG, FLAC, M4A and more. Customize bitrate and sample rate.
Audio Merger
Free online tool to merge multiple audio segments into one.
Audio Cutter
Free online MP3 audio cutter with visual waveform editing.
M3U8 Player
Free online M3U8 player for HLS streaming. Enter an M3U8 URL to watch live or on-demand video, with multi-bitrate switching, adaptive bitrate streaming, and pure browser-side playback. Compatible with Chrome, Firefox, Safari, and Edge.
Video Batch Scale
Free online video scaler. Scale video resolution from 10% to 200% with presets. Batch processing. Pure browser-side.
Video Batch Rotate
Free online video rotator. Rotate videos 90° clockwise, 90° counterclockwise, or 180°. Batch processing. Pure browser-side.
Batch Video Speed Adjuster
A free online tool for adjusting the speed of multiple videos in bulk. Supports 0.25x–4x speed adjustment, batch processing of multiple videos, and pure in-browser local processing.
Video Flip
Free online video flip tool supporting horizontal and vertical flipping. Powered by the Video Editor, pure browser-side processing with no server upload.
Video Batch Flip
Free online video flipper. Flip videos horizontally or vertically. Batch processing. Pure browser-side.
Video Add Text
Free online video text overlay tool to add text on your video with customizable font, size, color and position. Powered by the Video Editor, pure browser-side processing with no server upload.
Video Watermark
Free online video watermark tool to overlay images on your video with adjustable position, size and opacity. Powered by the Video Editor, pure browser-side processing with no server upload.
Video Volume
Free online video volume adjuster supporting 0~300% volume and one-click mute. Powered by the Video Editor, pure browser-side processing with no server upload.
Video Speed
Free online video speed tool supporting 0.25x~4x speed adjustment while maintaining pitch. Powered by the Video Editor, pure browser-side processing with no server upload.
Video Batch Speed
Free online video speed changer. Adjust playback speed from 0.25x to 4x. Batch process multiple videos. Pure browser-side.
Video Remove Audio
Free online video audio remover. Remove audio track from videos with one click. Supports batch processing. Pure browser-side.
Video Aspect Ratio
Free online video aspect ratio changer. Supports 1:1/4:3/16:9/9:16 presets and custom ratios. Auto-fills with black bars. Pure browser-side.
Video Screenshot
Free online video screenshot tool. Capture single frame, interval frames, or specific count of frames. Output high-quality PNG/JPG images. Pure browser-side.
Video Reverse
Free online video reverser. Reverse video playback with one click. Supports MP4/AVI/MPG/MOV/FLV/3GP/WEBM/MKV/WMV formats. Pure browser-side processing.
Video Resize
Free online video resolution changer with preset resolutions and custom dimensions. Powered by the Video Editor, pure browser-side processing with no server upload.
Video Resolution
Free online video resolution converter. Supports 1080p/720p/480p/360p/240p presets and custom width/height. Batch processing, pure browser-side.
M3U8 to MP4
Free online M3U8 to MP4 converter. Enter an M3U8 URL to download and convert HLS streams to MP4 format. Supports fast stream copy and re-encoding modes, pure browser-side processing with no server upload.
Web M to MP4
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to MP4 format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. Best compatibility, batch processing supported.
Video to MPG
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to MPG format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. For DVD authoring, batch processing supported.
Video to 3GP
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to 3GP format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. For legacy phones, batch processing supported.
Video to WMV
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to WMV format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. For Windows platforms, batch processing supported.
Video to FLV
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to FLV format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. For streaming scenarios, batch processing supported.
Video to MKV
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to MKV format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. Multi-track support, batch processing supported.
Video to AVI
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to AVI format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. Broad compatibility, batch processing supported.
Video to MOV
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to MOV format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. Ideal for Apple devices, batch processing supported.
Video to Web M
Free online batch convert MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, GIF and more to Web M format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. Ideal for web embedding, batch processing supported.
Video to MP4
Free online batch convert any video to MP4 format. Supports custom video codec, bitrate, frame rate, resolution, and audio parameters. Best compatibility, batch processing supported.
Video Format Converter
An all-in-one video format converter supporting MP4, AVI, MPG, MOV, FLV, 3GP, Web M, MKV, WMV, GIF inter-conversion. Customize output parameters including video codec, bitrate, frame rate, resolution, video type, remove audio, audio codec, audio quality, sample rate, audio channels. Pure browser-side processing, no server upload.