0 WINS / 0 LOSSES

Best PNG Compression Tool

Up to 0% smaller than LZMA. 0 wins, 0 losses across real-world PNG files. Lossless, verified, free to try.

Compress PNG Free Full Benchmarks
0%
Best Saving vs LZMA
0%
Median Saving
0W / 0T
Win / Tie Record
0
Losses

How PZIP Compresses PNG

PNG uses DEFLATE internally, but the container has uncompressed chunks (tEXt, iTXt, pHYs, tIME, etc.) and the pixel data can be recompressed with LZMA for modest gains. PZIP separates metadata chunks, recompresses raw pixel data, and guarantees never-worse output.

Codec: Structure-aware passthrough
Lossless
Byte-exact round-trip verified on every file
Never-Worse
Falls back to LZMA if it can't beat it
Automatic
Type detection + codec selection is automatic

History of PNG

Est. 1996Created by W3C / PNG Group

PNG (Portable Network Graphics) was created in 1996 as a patent-free replacement for GIF. It uses DEFLATE compression with optional filtering (sub, up, average, Paeth). PNG supports full alpha transparency and up to 48-bit color.

Compression Timeline

1996

PNG 1.0 specification published

2003

PNG becomes ISO standard (ISO/IEC 15948)

2008

OptiPNG and PNGCrush optimize DEFLATE parameters

2026

PZIP structure-aware passthrough beats LZMA on PNG

Real-World Benchmark Results

Every file tested with LZMA-9 (maximum compression) as baseline. Round-trip correctness verified on every file.

FileSizePZIP vs LZMAResultDownload
307.png20.5 KBTIEERROR Source
309.png20.6 KBTIEERROR Source
346.png20.5 KBTIEERROR Source
366.png25.8 KBTIEERROR Source
399.png21.3 KBTIEERROR Source
557.png24.5 KBTIEERROR Source
702.png23.5 KBTIEERROR Source
GEMM_double.png63.8 KBTIEERROR Source
Playwrite-Belgie-Vlaanderen-1.png185.1 KBTIEERROR Source
Playwrite-Colombia-Guides_1.png69.2 KBTIEERROR Source
Playwrite-Deutschland-SAS-3.png139.4 KBTIEERROR Source
Playwrite-Deutschland-SAS-Guides_1.png71.7 KBTIEERROR Source
Playwrite-Italia-Moderna-3.png94.8 KBTIEERROR Source
Playwrite-Mexico-1.png220.9 KBTIEERROR Source
Playwrite-Netherland-Guides_2.png46.2 KBTIEERROR Source
Playwrite-Portugal-Guides_2.png43.9 KBTIEERROR Source
Playwrite-Slovensko-Guides_2.png49.5 KBTIEERROR Source
Playwrite-Tanzania-1.png203.6 KBTIEERROR Source
Playwrite_NZ-Basic_1.png280.2 KBTIEERROR Source
Table.png183.9 KBTIEERROR Source
concurrent-burgers-02.png163.1 KBTIEERROR Source
constanza_artigas.png33.7 KBTIEERROR Source
digest.png82.7 KBTIEERROR Source
exemplo-cod.png25.1 KBTIEERROR Source
haley_fiege.png35.9 KBTIEERROR Source
image23.png30.1 KBTIEERROR Source
image4.png336.5 KBTIEERROR Source
jaakkosuomalainen.png127.1 KBTIEERROR Source
lauragarciamut.png132.5 KBTIEERROR Source
loop-terminology-initial-loop.png40.7 KBTIEERROR Source
opencv-logo.png35.5 KBTIEERROR Source
opencv-logo2.png41.9 KBTIEERROR Source
petersen.png22.9 KBTIEERROR Source
phaser-starfield.png330.7 KBTIEERROR Source
place2@2x.png553.2 KBTIEERROR Source
screenshot-ef9fbef.png233.4 KBTIEERROR Source
screenshot_chat_1024x768.png29.1 KBTIEERROR Source
sequential-large.png42.8 KBTIEERROR Source
suonmaysophanith.png109.0 KBTIEERROR Source
text_code_sql_700x450.png28.1 KBTIEERROR Source
wiki-mobile-photo.png1.5 MBTIEERROR Source
wikimedia2_2011_hu_shares.png44.8 KBTIEERROR Source
wikimedia2_a_chart_about_the_scores_of_students.png32.5 KBTIEERROR Source
wikimedia2_aggressive_initiation_and_response_of_amargosa_river_pupfish_with_avt.png136.9 KBTIEERROR Source
wikimedia2_amount_granted_by_the_foundation_over_time_increasing_-_audit_report.png38.6 KBTIEERROR Source
wikimedia2_arbeitsklima-index_-_zeitreihe_2008-2013_-_nach_regionen.png84.6 KBTIEERROR Source
wikimedia2_bar_chart_of_waymo_passenger_miles_travelled_in_california.png121.1 KBTIEERROR Source
wikimedia2_belgija.png44.5 KBTIEERROR Source
wikimedia2_besucher_statistik.png25.9 KBTIEERROR Source
wikimedia2_bilateral_trade_between_india_and_china_indias_imports_from_china_2010_to_2019.png448.7 KBTIEERROR Source
wikimedia2_bildschirmfoto_2021-02-13_um_06.37.03.png6.1 MBTIEERROR Source
wikimedia2_bimodalants.png118.6 KBTIEERROR Source
wikimedia2_business_expenses_of_pimps_.png33.8 KBTIEERROR Source
wikimedia2_chart_1_1971_operation_searchlight-some_instances_of_number_of_hindus_killed_in_diff.png117.0 KBTIEERROR Source
wikimedia2_chart_of_college_student_disabilities.png293.3 KBTIEERROR Source
wikimedia2_concorde_price_chart.png1.4 MBTIEERROR Source
wikimedia2_contibuciones_2016_-_2021.png101.6 KBTIEERROR Source
wikimedia2_cookies-chart-1.png215.3 KBTIEERROR Source
wikimedia2_cookies-chart.png417.8 KBTIEERROR Source
wikimedia2_crans-montana-2026-âge-victimes.png21.2 KBTIEERROR Source
wikimedia2_crimes_and_robberies.png22.7 KBTIEERROR Source
wikimedia2_cumulative_vs_normal_histogram.png50.2 KBTIEERROR Source
wikimedia2_dokončené_a_zahájené_byty.png54.7 KBTIEERROR Source
wikimedia2_election_chart_1_-removebg-preview.png42.1 KBTIEERROR Source
wikimedia2_extorsion_denuncia.png26.5 KBTIEERROR Source
wikimedia2_figure_10_volunteering_trajectories_1__where_experts_and_amateurs_meet_.png46.4 KBTIEERROR Source
wikimedia2_figure_11_volunteering_trajectories_2__where_experts_and_amateurs_meet_.png42.4 KBTIEERROR Source
wikimedia2_figure_9_wikipedia_reliability__where_experts_and_amateurs_meet_.png32.5 KBTIEERROR Source
wikimedia2_foreign_students_from_new_southbound_major_countries_studying_in_taiwan_s_institutes.png32.7 KBTIEERROR Source
wikimedia2_francuska.png45.3 KBTIEERROR Source
wikimedia2_fyre_histogram_22.39067_computation_a.png125.2 KBTIEERROR Source
wikimedia2_gambar_5_mirrored_bar_chart_dari_tema-tema_item_wikidata_yang_beragam.png149.0 KBTIEERROR Source
wikimedia2_graph_of_amur_sturgeon_and_caviar_production.png54.0 KBTIEERROR Source
wikimedia2_gráfica_de_evolución_demográfica_de_saldaña_de_burgos_entre_2000_y_2024.png59.4 KBTIEERROR Source
wikimedia2_gtco_s_2024_dividend_charts.png41.7 KBTIEERROR Source
wikimedia2_histogram_and_kernel_density_estimate_for_the_software_data.png20.2 KBTIEERROR Source
wikimedia2_histogram_explanation__vysvětlení_histogramu_.png22.8 KBTIEERROR Source
wikimedia_04_hegasy_hand_disinfection_wiki_ccbysa.png723.4 KBTIEERROR Source
wikimedia_100_layer_lasagna_cross_section.png235.4 KBTIEERROR Source
wikimedia_12_phases_of_research_-_fsna.png446.2 KBTIEERROR Source
wikimedia_1857_earthquake_fig._104.png24.4 KBTIEERROR Source
wikimedia_1db_compression_point.png25.1 KBTIEERROR Source
wikimedia_2.68_ga_finalized_ver_2-1.png728.3 KBTIEERROR Source
wikimedia_20101230ja091_us_report_banner_metrics_minutely_imp.png106.4 KBTIEERROR Source
wikimedia_20200810angermeeng.png515.7 KBTIEERROR Source
wikimedia_20200810angermejpn.png513.7 KBTIEERROR Source
wikimedia_24th_meridian_sudan.png46.2 KBTIEERROR Source
wikimedia_2blockchaingraph.png28.5 KBTIEERROR Source
wikimedia_2d_normally_distributed_points.png26.7 KBTIEERROR Source
wikimedia_2r3rtcrt_-_plot_angoli_-_tk_-_sist._assoluto_-_c_bg_3_dwtk1_d_dwtk2_d_dwtk2_d_dwtk4_x.png102.2 KBTIEERROR Source
wikimedia_2r3rtcrt_-_plot_angoli_-_tk_-_sist._background_-_c_bg_3_dwtk1_d_dwtk2_d_dwtk2_d_dwtk4.png96.7 KBTIEERROR Source
wikimedia_2r3rtcrt_-_plot_strutture_3d_-_pk_-_corpo_1_-_dwtk1_d_dwtk2_d_dwtk2_d_dwtk4_x_dwtk5_x.png213.9 KBTIEERROR Source
wikimedia_3-phase_sys_with_20__3rd_harmonic.png52.6 KBTIEERROR Source
wikimedia_31899_adityamohan.png61.8 KBTIEERROR Source
wikimedia_3_node_directed_graph.png36.2 KBTIEERROR Source
wikimedia_3month-lapse-structure.png27.4 KBTIEERROR Source
wikimedia_3vehicleperformancemetrics.png126.9 KBTIEERROR Source
wikimedia_4_procesy_správy_produktových_informací.png43.7 KBTIEERROR Source
wikimedia_5-point_course.png72.6 KBTIEERROR Source
wikimedia_528th_sustainment_brigade__special_operations___airborne__.png104.5 KBTIEERROR Source
wikimedia_54-fz-schema.png39.6 KBTIEERROR Source
wikimedia_5_local_galactic_group__blank_2_.png176.8 KBTIEERROR Source
wikimedia_5ht2c_pathway.png83.7 KBTIEERROR Source
wikimedia_6-11_framework_scheme_for_3dclass.png255.2 KBTIEERROR Source
wikimedia_6_virgo_supercluster__blank_2_.png377.7 KBTIEERROR Source
wikimedia_77class77.png64.9 KBTIEERROR Source
wikimedia_7_local_superclusters__blank_2_.png1.4 MBTIEERROR Source
wikimedia_a_fragment_of_the_hmm_lattice_showing_two_possible_paths.png99.8 KBTIEERROR Source
wikimedia_a_look_at_a_game_program_s_structure.png25.0 KBTIEERROR Source
wikimedia_a_sdiagramm.png32.0 KBTIEERROR Source
wikimedia_abbildung_cognitive_finance_als_interdisziplinärer_forschungsansatz2.png79.7 KBTIEERROR Source
wikimedia_ablauf_einer_lernphase.png152.5 KBTIEERROR Source
wikimedia_ablauf_einer_phase_im_agilen_lernen.png410.9 KBTIEERROR Source
wikimedia_absatz_cd-lp_1984-2021.png38.0 KBTIEERROR Source
wikimedia_abstrahierung_mit_hilfe_von_geogebra_i.png22.9 KBTIEERROR Source
wikimedia_abu_keynes_1.png38.7 KBTIEERROR Source
wikimedia_abu_new_classical.png42.2 KBTIEERROR Source
wikimedia_account-chain_fork_structure.png26.4 KBTIEERROR Source
wikimedia_acquise_procedure_sdsc-bw_simplified_2019-11.png213.2 KBTIEERROR Source
wikimedia_active_non-apoptotic_protease.png76.4 KBTIEERROR Source
wikimedia_activityandrfasuccess.png26.4 KBTIEERROR Source
wikimedia_actualización_de_inventario_ff.png23.2 KBTIEERROR Source
wikimedia_adapting_and_writing_language_lessons_diagram_p322.png41.6 KBTIEERROR Source
wikimedia_adaptive_noise_cancelling_configuration.png35.1 KBTIEERROR Source
wikimedia_adding_a_caption_flow_diagram.png81.8 KBTIEERROR Source
wikimedia_addition_algoritm_4.png125.7 KBTIEERROR Source
wikimedia_additive_and_dominance_effects.png28.1 KBTIEERROR Source
wikimedia_addressed_fiber_bragg_structure.png1.2 MBTIEERROR Source
wikimedia_aditz_01.png59.7 KBTIEERROR Source
wikimedia_aditz_02.png53.8 KBTIEERROR Source
wikimedia_aditz_laguntzailea_01.png308.2 KBTIEERROR Source
wikimedia_aditz_laguntzailea_02.png382.4 KBTIEERROR Source
wikimedia_aditz_laguntzailea_03.png377.5 KBTIEERROR Source
wikimedia_aditz_laguntzailea_05.png363.0 KBTIEERROR Source
wikimedia_aditz_laguntzailea_06.png280.1 KBTIEERROR Source
wikimedia_aditza1.png66.2 KBTIEERROR Source
wikimedia_administrativer_saldo__primärsaldo__nulldefizit.png32.0 KBTIEERROR Source
wikimedia_agents.png40.7 KBTIEERROR Source
wikimedia_aginte-perpaus_07.png111.9 KBTIEERROR Source
wikimedia_aktivní_tlumení.png24.8 KBTIEERROR Source
wikimedia_amc-are_task_organization.png169.5 KBTIEERROR Source
wikimedia_analyse_de_grotte_parcours_usgers.png257.2 KBTIEERROR Source
wikimedia_comarca_forestal_14_de_la_comunidad_de_madrid__2007__parque_regional_de_la_cuenca_alt.png738.3 KBTIEERROR Source
wikimedia_comarca_forestal_8_de_la_comunidad_de_madrid__2007__parque_regional_del_sureste__mapa.png728.0 KBTIEERROR Source
wikimedia_ifma_chapters_coverage_map.png2.0 MBTIEERROR Source
wikimedia_lugares_de_interés_comunitario_de_la_comunidad_de_madrid__2006__distribución_geográfi.png677.9 KBTIEERROR Source
wikimedia_mexico_transgender_rights.png479.6 KBTIEERROR Source
wikimedia_png_transparency_demonstration_1.png219.3 KBTIEERROR Source
wikimedia_resultado_da_eleição_municipal_de_salvador_em_2012_por_zona_eleitoral__2º_turno_.png32.9 KBTIEERROR Source

Frequently Asked Questions

How can PZIP compress PNG if it's already compressed?

+

PNG uses DEFLATE, which is weaker than LZMA. PZIP can decompress the pixel data and recompress with LZMA, plus it compresses metadata chunks separately.

Does PZIP modify the PNG image?

+

No. 100% lossless — every pixel, every alpha value, every metadata chunk is preserved byte-exactly.

PZIP vs Other Compressors for PNG

FeaturePZIPLZMA / xzgzipzstd
Type-AwareYesNoNoNo
LosslessYesYesYesYes
Never-Worse GuaranteeYesN/AN/AN/A
Best PNG Saving0%BaselineWorse~Similar
Round-Trip VerifiedEvery fileManualManualManual

Try PZIP on Your PNG Files

Upload any PNG file up to 30 MB. Free during beta — no signup required. See how much smaller PZIP makes it.

Compress PNG Now All File Types
Baseline:     LZMA-9 (maximum compression)
Competitors:  gzip-9, bz2-9, brotli-11, zstd-19, PPMd 2-24
Verification: Byte-exact round-trip on every file
Guarantee:    Never-worse (PZIP <= LZMA, always)
Test files:   149 real-world PNG files
Updated:      2026-02-15